Square Bar Weight Calculator
Weight of solid square bar from side dimension — all common metals
Solid square bar weight is width × width × length × density — a full square cross-section with no hollow. This calculator uses the exact density of your chosen alloy, so steel, stainless, aluminum and brass square bar all read correctly.
A 25 mm steel square bar weighs about 4.91 kg/m — nearly four times a 25×25×3 square tube of the same outside size. Square bar is used where you need solid stock to machine or forge, not where you want light weight.
Frequently Asked Questions
How do I calculate square bar weight per meter?
Weight per meter = side² × density. A 25 mm steel square bar: 625 mm² × 7.85 g/cm³ ≈ 4.91 kg/m.
What does a 20 mm steel square bar weigh?
About 3.14 kg per meter (20² × 7.85). A 6-meter length is roughly 19 kg.
How much heavier is square bar than round bar?
About 27% heavier for the same across dimension, because a square section has more area than a circle of the same width (a² vs π/4 × D²).