Technical Resource
Steel Billet Weight Calculator
Billet weight calculations are theoretical planning tools unless the contract defines the weighing basis. For a square or rectangular billet, use ordered dimensions, length, quantity and an explicit material-density assumption; then keep dimensional tolerances and actual certified/shipping mass separate.
A calculated figure and a weighed figure answer different questions. This calculator gives you the first, shows every assumption behind it, and keeps the second where it belongs — in the contract and on a certified document.
Tolerance and assumption contextFive inputs behind every estimate
- Ordered dimensionsNominal cross-section and length — the ordered figures, not a measured piece.
- An explicit densityA material property you supply or confirm. Shown, never applied silently.
- Quantity and bundle countHow many pieces, and how they are grouped into lifts if that matters to you.
- The tolerance bandWhere the section is permitted to sit. It sets how far the real mass can move.
- Weighing basisWhat the contract says governs the charged mass — certified, theoretical or shipping.
The result is a nominal figure from ordered dimensions. Real mass moves within the permitted tolerance band — see the tolerance context below.
Working technical tool
Steel Billet Weight Calculator
Enter the ordered dimensions, the length, the quantity and a density. The calculator shows the cross-sectional area, the volume of one piece, the nominal mass per piece and the nominal lot mass — with every unit conversion and assumption visible.
Nominal mass
m = A × L × ρ
- Cross-sectional area
- —
- Length
- —
- Density
- 7850 kg/m³
- Quantity
- —
Still needed: Side, Length, Quantity. No figure is shown until every required input is present — a result built on a missing dimension or an assumed density would look authoritative and be wrong.
Bundle count and payload limit are optional. Where you supply them, the result adds a grouping check.
Method and conditions
The formula, the units, and what it does not tell you
Mass equals cross-sectional area multiplied by length multiplied by density. Simple arithmetic — the work is in the units and in being clear about which of the three inputs is a fact and which is an assumption.
The calculation, step by step
- 01
Cross-sectional area
Square: a². Rectangular: a × b. Round: πr², with r derived as the diameter divided by two. All in square millimetres.
- 02
Normalise to metres
Area in mm² is divided by 1,000,000 to give m², and length in mm is divided by 1,000 to give m. Every conversion is shown in the result so the arithmetic can be checked.
- 03
Volume per piece
Area in m² multiplied by length in m gives the volume of one billet in cubic metres.
- 04
Apply the density
Volume in m³ multiplied by the density in kg/m³ gives the nominal mass of one piece in kilograms. The density is the value you supplied — it is never substituted.
- 05
Multiply by quantity
Mass per piece multiplied by the piece count gives the nominal lot mass, shown in both kilograms and tonnes.
Units, sources and assumptions
- Unit system
- SI throughout. Dimensions are entered in millimetres, length in millimetres, density in kilograms per cubic metre, and all figures are reported in metres, cubic metres and kilograms.
- Geometry source
- The ordered nominal dimensions. A measured piece will differ, because real rolled material sits somewhere within its permitted tolerance band.
- Density basis
- An editable assumption, labelled and overridable. It is a material property rather than a geometric one, so the correct value follows the material you are buying, not the shape.
- Assumptions
- One: the section is exactly the dimension entered. Two: the density applies uniformly across the piece. Both are stated so a reader can see where a real figure would move.
- Applicability limitation
- A theoretical planning tool. It does not produce a certified mass, and it does not determine which mass the contract charges on.
Worked examples
Three calculations, and what each one is for
Each example shows the inputs, the arithmetic, how to read the figure, and the decision it changes. None uses a real company's data, and none asserts a certified mass.
Example 01
Square billet — mass per piece for a furnace charge estimate
Inputs
Square, side 150 mm, length 12,000 mm, quantity 1, density 7,850 kg/m³ (labelled carbon-steel assumption).
Method
Area = 150² = 22,500 mm² = 0.0225 m². Length = 12.0 m. Volume = 0.0225 × 12.0 = 0.27 m³. Mass = 0.27 × 7,850 = 2,119.50 kg per piece.
Result. 2,119.50 kg per piece, on the stated density assumption.
Reading it. The figure is nominal. If the section is permitted to sit anywhere in a tolerance band, the real mass of a piece varies with where it falls — and the density assumption is carrying as much of the answer as the geometry is.
Decision impact. Useful for sizing a charge and for a first-pass tonnage. Not usable as the mass your supplier will invoice on unless the contract says so.
Verification step. Confirm the density that applies to the actual grade, and ask what tolerance band the section is supplied within.
Example 02
Rectangular billet — lot mass for a transport enquiry
Inputs
Rectangular, sides 150 mm and 200 mm, length 6,000 mm, quantity 100, density 7,850 kg/m³.
Method
Area = 150 × 200 = 30,000 mm² = 0.03 m². Length = 6.0 m. Volume per piece = 0.18 m³. Mass per piece = 1,413.00 kg. Lot = 141,300.00 kg = 141.300 t.
Result. 141.300 t nominal for the lot.
Reading it. The lot figure is the piece figure multiplied by the count, so it inherits both assumptions and adds one of its own — that every piece is identical. In practice a lot varies piece to piece within the tolerance band.
Decision impact. Enough to open a freight conversation and to check the tonnage against a payload limit. Not a substitute for a certified weight at dispatch.
Verification step. Name the port or delivery place and the Incoterm rule, then confirm which mass the carriage will be charged against.
Example 03
Round billet — checking a bundle against a payload limit
Inputs
Round, diameter 150 mm, length 6,000 mm, quantity 60, density 7,850 kg/m³, bundle count 6, payload limit 25,000 kg per bundle.
Method
Radius = 75 mm. Area = π × 75² = 17,671.46 mm² = 0.017671 m². Volume per piece = 0.106029 m³. Mass per piece = 832.33 kg. Lot = 49,939.54 kg. Per bundle = 8,323.26 kg. Margin against the limit = 16,676.74 kg.
Result. 49.940 t nominal, 8,323.26 kg per bundle, comfortably inside the stated 25,000 kg limit.
Reading it. The margin looks large, which is the point — the check exists to catch the case where it is not. If the margin comes out small or negative, the tolerances matter more than the arithmetic does.
Decision impact. Confirms the grouping is workable at the limit you supplied, and shows how much headroom exists for the tolerance band and any handling allowance.
Verification step. Confirm the payload limit is the figure the carrier will actually apply, and that axle distribution has been checked separately.
Tolerance and assumptions
What moves the number, and by how much it matters
Every input in the calculation is either a measurement, a property or an agreement. These are the ones that move a real figure away from a nominal one — and the boundary that keeps a planning number from becoming a commercial claim.
| Input | Unit | What it is | How it moves the result | Evidence boundary |
|---|---|---|---|---|
| Cross-section | mm | The ordered nominal dimension of the section. | Enters as a square for square sections and linearly for rectangular ones, so a small dimensional change has a disproportionate effect on area. | The tolerance band is set by the controlling standard or drawing. No band is asserted here. |
| Length | mm | The ordered nominal length of one piece. | Linear. A change in length moves mass in direct proportion, with no compounding. | Length tolerance is a mill and handling matter, agreed in the order rather than assumed. |
| Density | kg/m³ | A material property, supplied or confirmed by you. | Linear and uniform. It scales the entire result without changing the geometry. | Not a geometric fact, and not a property that can be asserted for a grade you have not named. |
| Quantity | pieces | The piece count in the lot. | Multiplies the per-piece figure. It assumes every piece is identical, which a tolerance band makes approximate. | Confirm against the packing list at dispatch rather than the order quantity. |
| Bundle count | lifts | How the pieces are grouped, for a payload check. | Divides the lot mass. It changes the grouping, not the total. | Packing and handling arrangement is agreed in the order. |
| Payload limit | kg | A planning limit you supply. | Does not change the mass. It is the figure the mass is compared against. | A limit you enter here is not a vehicle rating and not a load plan. |
| Weighing basis | contract term | What the contract says the charged mass is based on. | Does not change the calculation at all — it changes which figure is commercial. | Determined by the purchase order or contract, never by a calculator. |
Nominal is not the same as actual. A nominal calculation assumes the section is exactly the dimension entered. Real rolled material sits within a permitted band, so the mass of a piece varies with where in that band it falls, and the variation accumulates across a lot. That is why a theoretical figure and a certified weighed mass are different quantities rather than two measurements of the same one. No tolerance value or composition is asserted here — those belong to the controlling document in your order.
Where a grade route bears on the density assumption
Density follows the material, not the shape. Where the grade is still open, the assumption behind the calculation is open with it. No equivalence is asserted here between 3SP, 5SP, Q235B, S235 and any ASTM designation — a comparison of that kind is a conditional engineering judgement to be agreed for the order.
Where a size route bears on the geometry
The section is the input with the most leverage on the answer, and it is also the one the receiving equipment constrains. A size route confirms the nominal geometry and its basis; it settles nothing about the density you should be applying.
Verification and misuse controls
Where a mass figure is misapplied, and what closes each gap
The calculation is not usually where things go wrong. These are the points where a correct figure gets used for a purpose it does not serve — and the evidence that settles each one.
| Requirement | You must specify | Evidence to request | Accepted by | If it is missing |
|---|---|---|---|---|
| Density basis | The density that applies to the material actually being bought, stated as a value rather than assumed. | Confirmation of the value for the grade, or your own stated engineering assumption. | You, as the party who owns the assumption behind the figure. | A number that looks authoritative and rests on a property nobody confirmed. |
| Dimension tolerance band | The band the section is permitted to sit within, by the controlling standard or drawing. | The controlling document with its edition, and the dimensional record at dispatch. | Your intake function, against the stated basis. | A nominal figure treated as a range. The error compounds across a lot without anyone seeing it. |
| Weighing basis | What the contract says the charged mass is based on — certified, theoretical or shipping. | The purchase order or contract clause that states it. | The commercial parties, at contract rather than at dispatch. | Two parties working to different mass bases, and a discrepancy with no agreed way to resolve it. |
| Certified mass | Whether a certified weighed figure is required, and on what equipment. | A weighbridge or scale certificate for the dispatch. | The party the contract designates as the accepting authority. | A theoretical figure used commercially, and a dispute the calculation cannot settle. |
| Lot identity | How pieces are grouped and marked so the count and the mass can be reconciled. | Packing list and the marking record tying pieces to the dispatch. | You, at intake, against the packing list. | A tonnage that cannot be reconciled to physical pieces if the count is questioned. |
| Shipment documents | The document set, named place and the Incoterm 2020 rule in force. | Packing list, weight documents, and destination-specific paperwork. | Importer or clearing agent at the named place. | Freight charged against one basis while the contract assumes another. |
Four ways a correct figure gets misused
Presented as an exact weight
A figure carried to two decimal places looks measured. It is not — it is arithmetic on three inputs, two of which are nominal or assumed.
Used as the invoicing basis without agreement
Theoretical mass becomes commercial only when the contract says so. Until then the agreed weighing method governs.
Compared against a certified mass as if equivalent
A nominal figure and a weighed figure are different quantities. A difference between them is expected, not evidence of a shortfall.
Applied across grades without changing the density
The geometry may be identical while the material is not. Carrying one density across a grade change misstates the mass by the density difference.
When engineering review is required
This calculator is arithmetic, not engineering approval. Take the result to a technical reviewer where the density is being assumed rather than confirmed, where the tonnage will be used commercially, or where a transport decision depends on the margin being right rather than roughly right.
Product decision handoff
Where a mass figure is checked against the actual product
Two registered type routes carry this forward. Each answers a different question about the material the calculation has been applied to.
Continuous casting billet
Continue here when the geometry is settled and the open question is how the form is produced and what its internal condition implies.
The route describes the production method. It fixes no density and no section, so it does not by itself confirm the inputs behind your figure.
continuous casting billet supplierRebar-grade billet
Continue here where the mass is being planned against a reinforcement programme and the acceptance basis comes from a product standard.
Reinforcement acceptance and general engineering acceptance are different controls. Suiting one does not settle the other.
rebar billet supplier
The calculation ends where the load plan begins
A payload comparison tells you whether a tonnage fits inside a limit you supplied. It does not tell you how the pieces are arranged, where the weight sits, or what the axles are carrying. Those are transport-engineering decisions, and they belong to a planner who can see the vehicle and the load — not to a mass calculation.
Related registered tools and routes
Where the figure takes you next
Grouped by the task that follows the calculation. Each path answers a question the figure raises but does not settle.
Weight and calculation
Billet hierarchy
Downstream applications
GCC product × country routes
Destination-specific mass and document inputs
Six destinations, and the input that most often delays each one. Each card asks for the commercial detail the route needs — none claims a served market or a stock position.
United Arab EmiratesDomestic supply, coordinated from Dubai.Name the receiving works and the weighing basis the contract will use. Domestic movement is arranged from Dubai against the agreed section, length and heat separation.steel billet supplier UAE
Saudi ArabiaTechnical submittal approval before release.Saudi routes commonly require submittal approval before material moves. Settle the specification, the mass basis and the named port or inland destination before anything is quoted.steel billet supplier Saudi Arabia
QatarApproval sequence and document scope led.Confirm the importer's document and classification position, the named port, and how long the approval sequence runs before the quotation can be finalised.steel billet supplier Qatar
OmanPort-oriented supply for downstream rolling.Name the port or inland delivery place and the Incoterm rule. Section and length are harmonised with what the receiving works takes in, and the mass basis is agreed up front.steel billet supplier Oman
KuwaitSupply planned against a production hand-off.Tie the tonnage to the production programme, and agree the shipment against the named destination and the delivery window that programme is working to.steel billet supplier Kuwait
BahrainIndustrial supply and re-export documentation.Industrial routes live or die on accurate paperwork. Confirm the document set, the named place and the importer's requirements before dispatch, not after arrival.steel billet supplier BahrainWhat every route needs before it can be quoted. The named port, terminal or inland place; the Incoterm 2020 rule and the named place it applies to; the importer's document and classification position; and which mass basis the carriage and the contract will use. Given those, a route can be quoted against a tonnage both parties understand the same way.
Expert insight
What separates an estimate from an “exact weight” claim
A source-backed decision note. The question is where a planning figure stops being useful and starts being misleading.
Why does the same number mean different things to a planner and a contract?
The World Steel Association glossary classifies billet among semi-finished steel products — the intermediate form produced for further rolling rather than a finished article. That classification is the source's contribution, and it is worth being precise about what it does and does not support.
What the source establishes. That billet is a defined product class within semi-finished steel, which is why an enquiry about it can be structured around a product identity rather than an ad-hoc description.
What it does not establish. Any density value, any dimensional tolerance, and — most importantly here — any commercial weighing basis. A classification tells you what a thing is, not how it is bought.
That gap is exactly where a mass estimate becomes misleading. Density is a material property that has to be supplied or confirmed rather than inferred from a product class. Tolerances are set by the controlling standard or drawing. And the weighing basis — whether the charged mass is theoretical, certified or shipping — is a contract term that no classification and no calculation can supply.
A useful estimate exposes all three: the shape and dimensions it assumed, the density it applied and where that value came from, and the tolerance band the real material will sit within. It labels its output as theoretical. An "exact weight" claim asserts a precision it cannot have, because the inputs are nominal and the density is an assumption until someone confirms it.
Buyer implication. Expose the shape, dimensions, length, density and tolerance assumptions, and label the output as theoretical until actual weighing is available.
Source and scope
- Primary source
- World Steel Association — Glossary: billet and semi-finished products
- Document reference
- worldsteel.org — about steel glossary
- Method
- The buyer decision is compared against the source scope, and what the source establishes is kept separate from what is order-specific.
- Information date
- 2026-10-03
- Scope and limitation
- The source supports the product classification only. Density, tolerances and the commercial weighing basis remain explicit inputs, assumptions and contract terms.
- Evidence boundary
- The source does not prove inventory, price, lead time, origin, certification or market coverage. Those remain quotation- and evidence-dependent.
Buyer advantages
What a transparent estimate changes
No claim here rests on being better than anyone. Each one is a buyer concern mapped to something checkable, and then to what it changes about the decision.
The assumptions are visible, not buried.
Evidence: Shape, dimensions, length, density and every unit conversion are shown alongside the result rather than hidden behind it.
Outcome: You can check the arithmetic, and you can see which input the answer is most sensitive to.
Theoretical and certified mass stay separate.
Evidence: The output is labelled as a nominal figure, and the weighing basis is named as a contract term.
Outcome: A planning number cannot drift into a commercial claim without someone deciding it should.
A missing input stops the calculation.
Evidence: The calculator reports which fields are still needed rather than substituting a plausible value.
Outcome: No figure reaches a decision carrying an assumption nobody made deliberately.
A payload check happens before the load is booked.
Evidence: Bundle count and a payload limit you supply produce a per-bundle mass and the margin against your limit.
Outcome: Overweight grouping surfaces during planning, not at the weighbridge.
The calculation travels with its own working.
Evidence: Copying the result includes the inputs, the method, the unit conversions and the boundary note.
Outcome: A colleague or supplier can reproduce the figure and challenge an input rather than the answer.
Enquiry to delivery
Where a mass figure enters the process, and who owns it
From the first planning estimate to the certified weight at dispatch. Each stage names the input that has to exist before it can start, and the risk it closes.
Plan the tonnage
Owner: Buyer, or whoever is estimating the requirement
Input: Ordered dimensions, length, quantity and a stated density assumption.
Output: A nominal mass figure that carries its own assumptions visibly.
Risk closed: A tonnage that circulates as a fact after the assumptions behind it have been forgotten.
Confirm the density basis
Owner: Buyer, with the technical reviewer
Input: The density that applies to the material actually being bought.
Output: A stated value rather than a default carried across from another grade.
Risk closed: A figure applied to a different material than the one it was calculated for.
Check the tolerance band
Owner: Buyer and the receiving works
Input: The band the section is permitted to sit within, from the controlling document.
Output: A planning range rather than a single point estimate.
Risk closed: A nominal figure treated as a guarantee, with the variation compounding unseen across a lot.
Raise the enquiry with the mass basis named
Owner: Buyer to the commercial department
Input: The tonnage, the basis it was calculated on, quantity, named place, Incoterm and timing.
Output: A quotation that answers the same mass question the buyer asked.
Risk closed: Two parties quoting on different bases and a discrepancy discovered at the weighbridge.
Agree the weighing basis in the contract
Owner: Buyer and supplier, at contract stage
Input: Which mass the supply is charged on — theoretical, certified or shipping.
Output: A written basis that settles any later difference before it arises.
Risk closed: An argument about mass with no agreed method to resolve it.
Verify at dispatch
Owner: Supplier, with the party the contract designates
Input: The certified weight, the packing list, and the marking that ties pieces to the dispatch.
Output: A figure that can be reconciled against the plan and against the contract.
Risk closed: A dispatch whose tonnage cannot be checked back to the pieces actually loaded, if the count is ever disputed.
Buyer FAQ
Questions that come up after the first calculation
Technical and commercial points a planner or estimator raises once the figure is in hand — not definitions, which are settled above.
What formula is used for square billet weight?
Nominal mass equals cross-sectional area multiplied by length multiplied by density. For a square section the area is the side dimension squared; for a rectangular section it is side A multiplied by side B; for a round section it is pi times the radius squared. The calculator works in SI internally, so millimetres are converted to metres and the density you supply is applied consistently before any figure is shown.
Why is density shown as an editable assumption?
Because density is a material property, not a geometric one, and the correct value depends on what you are actually buying. Applying one density silently across carbon, alloy and coated products would present three different materials as if they weighed the same. The calculator shows you the value it is using, lets you override it, and records which value produced the result.
How do dimensional tolerances affect theoretical weight?
A nominal calculation assumes the section is exactly the ordered dimension. Real rolled material sits within a permitted tolerance band, so the actual mass of a piece varies with where in that band it falls, and the variation compounds across a lot. That is why a theoretical figure and a certified weighed mass are different quantities rather than different measurements of the same one, and it is why a tolerance band belongs in your planning range.
Can theoretical weight be used for invoicing?
Only if the contract says so. Theoretical weight becomes a commercial basis when the parties agree it, and the document that makes it binding is the purchase order or contract — not a calculator. Where the contract is silent, the weighing method agreed between the parties governs, and the certified or shipping mass is the figure that applies. Treat any calculated figure as planning information until the contract says otherwise.
How should payload limits be checked against bundle quantities?
Compare the nominal lot mass against the payload limit you entered and leave a margin for the tolerance band rather than planning to the limit exactly. Bundle count lets you convert a piece count into a number of lifts, so the comparison is per bundle rather than per lot. The result is a planning check against the limit you supplied — it is not a load plan, and a qualified transport planner still has to confirm the arrangement and axle distribution.
Send the tonnage, the basis behind it, and the destination
Include the section and length, the quantity, the density assumption you used and where it came from, the named place and the Incoterm 2020 rule. Name the mass basis you want the supply charged on, so the quotation and the contract are working to the same figure.
Or send the enquiry directly to sales@noordeirasteel.ae. Price on request — no price, stock or lead time is published.
What to attach
- Cross-section, length and how many pieces
- The density assumption used, and its source
- The tolerance band the section sits within
- Which mass basis the supply should be charged on
- Named place and the Incoterm 2020 rule
- Quantity with its unit and basis
- The document set the destination requires
Commercial department
- Mobile
- +971 56 398 0860
- Office
- Office 1015, Churchill Executive Tower, Business Bay, Dubai, United Arab Emirates
- Hours
- Monday – Saturday: 8.00 AM – 6.00 PM · Sunday: Closed
Reference formula
The formula, written out for a hand calculation
Short enough to apply to a spreadsheet or a calculator without this tool. The only care needed is in the units and in stating the density you used.
m = A × L × ρ
- m
- nominal mass of the piece, in kilograms
- A
- cross-sectional area, in square metres
- L
- length of the piece, in metres
- ρ
- density of the material, in kilograms per cubic metre
Area, by shape
The division by 1,000,000 converts square millimetres to square metres. Divide length in millimetres by 1,000 to get metres before multiplying.
What this reference does not give you
- No density value for a grade — that is a material property you supply or confirm.
- No dimensional tolerance band — that comes from the controlling standard or drawing.
- No certified or shipping mass — that comes from a weighing the contract recognises.
- No load plan — arrangement and axle distribution remain transport-engineering decisions.
A note on precision
The calculator reports several decimal places because the arithmetic supports it, not because the inputs do. An ordered dimension and an assumed density do not carry that precision, so quote the result to a sensible number of significant figures when it leaves the tool.
Worked examples
Three calculations laid out as a spreadsheet would
The same arithmetic in tabular form, with the unit conversion shown at each step so the working can be checked line by line.
Square — 150 mm side, 12 m, 1 piece
| Step | Value |
|---|---|
| Side a | 150 mm |
| Area a² | 22,500 mm² |
| Area in m² (÷ 1,000,000) | 0.0225 m² |
| Length in m (÷ 1,000) | 12.0 m |
| Volume (A × L) | 0.27 m³ |
| Density applied | 7,850 kg/m³ |
| Mass per piece (V × ρ) | 2,119.50 kg |
Verdict. One piece, one figure. The density is carrying as much of the answer as the geometry — change it by two per cent and the mass moves by two per cent.
Rectangular — 150 × 200 mm, 6 m, 100 pieces
| Step | Value |
|---|---|
| Sides a × b | 150 × 200 mm |
| Area a × b | 30,000 mm² |
| Area in m² (÷ 1,000,000) | 0.03 m² |
| Length in m (÷ 1,000) | 6.0 m |
| Volume (A × L) | 0.18 m³ |
| Mass per piece (V × ρ) | 1,413.00 kg |
| Lot mass (× 100) | 141,300.00 kg = 141.300 t |
Verdict. The lot figure assumes every piece is identical. Across a tolerance band the real total moves, so treat 141.300 t as a planning figure rather than a dispatch weight.
Round — Ø 150 mm, 6 m, 60 pieces in 6 bundles
| Step | Value |
|---|---|
| Diameter d | 150 mm |
| Radius r = d ÷ 2 | 75 mm |
| Area πr² | 17,671.46 mm² |
| Area in m² (÷ 1,000,000) | 0.017671 m² |
| Length in m (÷ 1,000) | 6.0 m |
| Volume per piece | 0.106029 m³ |
| Mass per piece | 832.33 kg |
| Lot mass (× 60) | 49,939.54 kg = 49.940 t |
| Per bundle (÷ 6) | 8,323.26 kg |
| Margin vs 25,000 kg limit | 16,676.74 kg |
Verdict. The margin is large, which is exactly what a payload check is for — it tells you the grouping is comfortable. If it came out small or negative, the tolerance band would matter more than the arithmetic.
Reference
Take the method with you
The formula, the unit conversions and the boundary note, in a form you can put into a spreadsheet or send to a colleague alongside a quotation.
Billet nominal mass — calculation record
- 01Record the shape and the ordered nominal dimensions in millimetres.
- 02Compute the cross-sectional area — a², a × b, or πr² — in square millimetres.
- 03Divide the area by 1,000,000 to convert to square metres.
- 04Divide the length in millimetres by 1,000 to convert to metres.
- 05Multiply area by length to get the volume of one piece in cubic metres.
- 06State the density in kilograms per cubic metre, and say where the value came from.
- 07Multiply volume by density for the nominal mass of one piece.
- 08Multiply by the piece count for the nominal lot mass; divide by 1,000 for tonnes.
- 09Label the result theoretical, and name the mass basis the contract will use.
The boundary, in one sentence
A calculated mass is a planning figure from nominal dimensions and an assumed density; it becomes a commercial figure only when the contract says the supply is charged on that basis.
Send us the calculation with the enquiry
Include the inputs you used, the density assumption and the basis you want the supply charged on. The commercial department can then answer against the same mass figure rather than a different one.
Or send it to sales@noordeirasteel.ae.