Materials calculator

Sheet & Plate Weight Calculator

Weigh sheet, plate, and round blanks from length, width, thickness, and material, in inches or millimeters.

Calculate sheet or plate weight

Choose your plate shape, then enter dimensions and quantity.

Set all
Sheet

Results

Total weight

19.63 lb

For the entered quantity and dimensions

Material density
0.284 lb/in³
Total surface area
16.06 ft²
Total volume
69.12 in³
Rectangular plate — isometric dimension guideWL

Isometric view · not to scale

L
48 in
W
24 in
t
0.06 in

Engineering material reference

Material densities for sheet and plate

Compare the materials we stock, or browse 186 reference densities for metals, plastics, composites, ceramics, rubber, glass, and wood.

8 materials
Material Family Common names kg/m³ lb/in³
Aluminum 5052-H32Metal—2,6800.097
Aluminum 6061-T6Metal—2,7200.098
Aluminum 7075-T6Metal—2,8100.102
Steel 1008 cold-rolledMetal—7,8500.284
Steel A36 HRPOMetal—7,8610.284
Galvanized steel G90Metal—7,8500.284
Stainless steel 304-2BMetal—8,0300.290
Stainless steel 316Metal—7,9900.289

Quick answer

How it works

Sheet weight is length times width times thickness times density. For steel, a quick check is about 41 lb per square foot for every inch of thickness. If your thickness is a gauge, convert it first. 16 gauge is 0.0598 in in mild steel, 0.0625 in stainless, and 0.0508 in aluminum.

How to use the calculator

  1. 1Choose Rectangular for sheet and plate, or Round for a disc or round blank.
  2. 2Enter the thickness in inches or mm. For a gauge, look up its thickness for your metal in the gauge chart first.
  3. 3Pick the alloy. Aluminum weighs about a third as much as steel for the same size.
  4. 4Set the quantity to weigh a whole order or a stack.

Key formulas

Sheet & plate weight formulas

Steel plate, pounds per square foot
lb/ft² = 40.9 × thickness (in)
For A36. Handbooks round it to 40.8. Multiply by the area in square feet.

Worked example

Round steel plate

Inputs
One 12 in diameter, 0.500 in thick disc of A36 steel (7,861 kg/m³).
Result
Volume = 56.55 in³ and weight = 16.06 lb.

The area is π/4 × 12² = 113.1 in², so the volume is 56.55 in³. At 0.284 lb/in³ that is 16.06 lb. Check: 0.785 ft² × 20.4 lb/ft² (0.5 in steel) = 16.0 lb.

Common questions

What to know before using the result

How much does a 4 × 8 sheet of 16 gauge steel weigh?
0.0598 in × 40.9 lb/ft² per inch is 2.45 lb/ft². A 32 ft² sheet weighs about 78 lb.
Why is my plate heavier or lighter than calculated?
Plate is rolled to a thickness tolerance and can run a few percent over or under. This page gives the theoretical weight from nominal thickness.
Does it subtract holes and cutouts?
No, it weighs the full blank. For a cut part, upload its STEP file to the part weight calculator.

Reference

Plate weight per square foot

Worked from the densities this calculator uses. Multiply by the area in square feet.

Thickness (in)A36 steel (lb/ft²)304 stainless (lb/ft²)5052-H32 aluminum (lb/ft²)
0.0602.452.510.84
0.1255.115.221.74
0.25010.2210.443.49
0.50020.4520.896.97
1.00040.9041.7713.94

Formula

m = A × L × ρ

Area times length gives volume, and volume times density gives weight. For tube, the area is the outside shape minus the hollow.

Engineering references

Assumptions and limits

  • Sheet and plate are a flat rectangle or disc of even thickness. Holes and cutouts are not subtracted.
  • Rectangular tube has a constant wall: the inside corner radius is the outside radius minus the wall.
  • Pipe, conduit, and copper presets use nominal wall. Real pipe can run thinner.
  • Fittings, couplings, weld seams, and coatings are not included.

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