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Steel Plate Weight Estimator
Build a plate bill of materials with live unit and line weights. Use AISC-standard densities for carbon steel, stainless, or aluminum when quoting, nesting, or shipping flat stock.
Plate Weight Takeoff
Current Item Weight
0 lbs
Bill of Materials
| Qty | Desc | Unit Wt | Total | |
|---|---|---|---|---|
| GRAND TOTAL: | 0 lbs | |||
Plate Weight Takeoff Practice
Flat plate often dominates miscellaneous steel tonnage — base plates, gussets, stiffeners, and shear tabs. Weight is simply volume × density: thickness × width × length × 0.2833 lb/in³ for carbon steel (490 lb/ft³), the same constant AISC manuals and Tekla/SDS2 use for estimating.
How to use this calculator
- Pick material density (carbon, 304/316 stainless, or 6061 aluminum).
- Enter finished plate thickness, width, length in inches, and quantity.
- Check Weight for a single line preview, or Add to List to accumulate a shipping/BOM total across mixed sizes.
Estimating tips for fabricators
Use finished (cut) sizes for shipping weight; add nest scrap separately when ordering mill plate. Stainless at ~0.29 lb/in³ runs heavier than carbon of the same size — a common surprise on architectural packages. For circular or irregular blanks, convert to an equivalent rectangle or use πr² × t × density offline, then add the line manually with matching weight intent.
FAQ
Should I enter nominal or actual thickness?
Use the thickness you will cut and ship. Mill plate tolerance can vary; for paid weight disputes, match the mill cert or scale ticket method your contract uses.
Does this include weld metal or paint?
No — plate body only. Add weld deposit and coatings with separate takeoff tools if they matter for freight.
Why 0.2833 instead of 0.283?
0.2833 lb/in³ is the conventional structural estimating density aligned with 490 lb/ft³. Small rounding differences rarely matter below several tons.
Can I mix materials on one list?
Yes. Change the material dropdown between Add to List clicks; each line stores its own density-driven weight.
Where this fits in the workflow
- Bolt Weight & Dimensions Calculator Add fastener weight to the plate weight for a complete shipping figure.
- AISC Steel Shape Database Look up the member the plate connects to.
- Paint & Weight Takeoff Roll plate area into the coating takeoff.
- Bolt Edge Distance Calculator Confirm the plate is wide enough for the bolt pattern.
Read the longer write-up
- Plate and Bolt Weight Takeoffs for Paint and Shipping Paint coverage and freight quotes need mass, not just piece counts. Convert plate dimensions and bolt schedules into pounds without waiting on a full model export.
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