📏Sheet Metal Weight Calculator

Select metal type, enter thickness × width × length in mm, and get the plate weight in kg instantly.

How to Use the Sheet Metal Weight Calculator

Enter the thickness, width, and length of a flat metal plate in millimeters, then select the metal type. The formula is: Weight (kg) = Thickness × Width × Length (mm) × Density (g/cm³) ÷ 1,000,000. Useful in metal fabrication, structural engineering, and purchasing for estimating plate weight before cutting or ordering. Ten common metals are built in — from carbon steel and stainless steel to aluminum, copper, brass, and more.

Frequently Asked Questions

What formula is used?

Weight (kg) = Thickness × Width × Length (mm) × Density (g/cm³) ÷ 1,000,000. The same as a rectangular volume calculation applied to flat plate geometry.

How much lighter is aluminum compared to steel?

Aluminum is about one-third the density of carbon steel (2.70 vs 7.85 g/cm³). A same-size plate weighs about 65% less in aluminum.

Do I have to enter dimensions in millimeters?

Yes. Multiply centimeters by 10 or meters by 1,000 to convert before entering.