Latest insights
Field notes, reference charts and estimating practice from the Steel Plate Weight Calculator desk.
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base plate + zinc layer
Galvanized steel plate weight is the base steel plus a zinc coating set by its coating grade. How to calculate both, and why a flat percentage is wrong.
same volume, lower density
Aluminum plate weight is about 34% of the same plate in steel, but the alloy matters. The calculation, the alloy spread, and a side-by-side comparison.
grade first, density second
Corten steel plate weight is calculated like carbon steel, because weathering steel's alloy additions barely move its density. With a worked example.
density changes the answer
The mild steel vs stainless steel density gap is about 1%, and some stainless grades are lighter than mild steel. The numbers on a same-size plate.
measure, split, subtract
Hexagonal plate weight follows from the across-flats dimension, while irregular profiles get split or taken from CAD. The area for each, and how to use it.
½ × base × height × t × ρ
Triangular plate weight starts with half the base times the perpendicular height. The formula, three-side drawings, and why the sloped edge is not it.
outer circle − inner circle
Annulus plate weight is the outer circle minus the inner circle, not the gap between two diameters. The correct subtraction, with a worked ring example.
π × r² × thickness × density
Circular plate weight comes from diameter, thickness and density. The formula, a worked example in metric and imperial, and the 4x error to avoid.
Work Out Your Plate Weight
Enter length, width and thickness, pick the grade, and read the total. Discs, rings and triangles too, in millimetres or inches.
