These formulas calculate the weight per foot for various pipe and structural shapes.
Weight for Steel Bars, Pipe, and Tubing (lb) formulas |
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\( W \;=\; 10.68 \cdot (D - t) \cdot t \) (pipe and round tubing) \( W \;=\; 13.60 \cdot [\; (l + w) - t \;] \cdot t \) (rectangular tube) \( W \;=\; 13.60 \cdot (D - t) \cdot t \) (square tube) \( W \;=\; 0.2836 \cdot t \cdot 144 \) (plate) \( W \;=\; 0.2225 \cdot d^2 \cdot t \) (plate circle) \( W \;=\; 0.2904 \cdot t \cdot 144 \) (sheet) \( W \;=\; 3.403 \cdot t \cdot w \) (flat bar) \( W \;=\; 2.945 \cdot d^2 \) (hexagon bar) \( W \;=\; 2.817 \cdot d^2 \) (octagon bar) \( W \;=\; 2.673 \cdot d^2 \) (round bar) \( W \;=\; 3.403 \cdot d^2 \) (square bar) |
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| Symbol | English | Metric |
| \( W \) = pipe weight per foot (approximate) | \( lbf \) | - |
| \( d \) = diameter | \( in \) | - |
| \( l \) = length (long side) | \( in \) | - |
| \( D \) = pipe outside diameter | \( in \) | - |
| \( t \) = pipe thickness | \( in \) | - |
| \( w \) = width (short side) | \( in \) | - |
