Calculate the weight of a piece of steel, flat bar, round bar, square bar, or pipe/tube, from its shape and dimensions.
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This calculator first finds the piece's volume based on its shape (flat bar: width × thickness × length; round bar: π × radius² × length; square bar: side² × length; pipe: π × (outer radius² − inner radius²) × length), then multiplies by steel's standard density of 0.2836 lb per cubic inch (about 490 lb per cubic foot) to get weight.
0.2836 lb per cubic inch reflects standard carbon steel. Different steel alloys and stainless steel grades can have slightly different densities, so for precise material ordering, especially for a specialty alloy, check the specific material's published density rather than relying solely on this general estimate.
No, for round bar, enter only the diameter; for square bar, enter only the side length. The second dimension field is only used for flat bar (thickness) and pipe (wall thickness).
Convert to inches first (1 inch = 25.4 mm), or use our Length Converter, since this calculator's density constant is calibrated to inch-based dimensions.
Stainless steel has a slightly different density than standard carbon steel (typically a bit higher, around 0.29 lb per cubic inch), so results using this calculator's carbon-steel density will be a close but not exact estimate for stainless steel pieces.
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