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Rebar weight calculator
Estimate steel bar weight from diameter, length and count.
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Enter your measurements
Weight = π × (diameter in metres)² / 4 × 7,850 kg/m³ × length × bar count.
Total weight
106.54 kg
Total length
120 m
Weight per metre
0.89 kg/m
Indicative estimate. Check drawings, waste and product data sheets. This does not replace an engineering study.
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METHOD
An estimate you can verify
Mass comes from cylindrical volume and theoretical steel density of 7,850 kg/m³. Cuts, laps and tolerances are excluded.
Technical sourceFAQ
How much does 12 mm rebar weigh per metre?
About 0.89 kg/m using a theoretical density of 7,850 kg/m³.
Are laps included?
No. Include the lengths and counts shown on execution drawings.