Plate Weight Calculator

This plate weight calculator will help you determine the weight of a plate-shaped material of any area, thickness, and density.

Shape

Material

First dimension (width, diameter or side)

First dimension (width, diameter or side) unit

Second dimension (thickness or wall)

Second dimension (thickness or wall) unit

Third dimension, if the shape needs it

Third dimension, if the shape needs it unit

Length

Length unit

Number of pieces

Price per pound

Clear

Weight326.706 lb148.191 kg of Carbon steel

Per piece326.7063 lb148.1915 kg

Weight per foot40.8383 lb/ft60.7741 kg/m

Cross-sectional area12 sq inwidth × thickness

Volume0.66667 cu ft18,877.9 cm³

Length each8 ft2.4384 m

Density7,850 kg/m³490.06 lb/cu ft

In US tons0.16335

The method

weight = cross-sectional area × length × density

Area first, then length

Every one of these is the same calculation: work out the cross-section, multiply by the length to get a volume, multiply by density to get a weight. What differs is only the geometry of the section.

For a pipe the section is the ring between the outside and inside diameters, π/4 × (OD² − ID²). Using the outside diameter alone treats the pipe as a solid bar and gives a wildly high answer, which is the usual mistake.

Densities are nominal. Steel varies a little with alloy, and rolled sections carry mill tolerances of a few per cent, so treat the figure as close rather than exact — for anything being lifted, use the mill certificate.