Use this free calculator to estimate steel weight from bar diameter, length and quantity. Enter your measurements and keep the material and wastage settings visible.
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Every input includes a simple explanation.
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Real site dimensions and workmanship affect the quantity.
Transport, cutting, pattern and breakage affect how much extra material to order.
This is an early quantity estimate. Site conditions, drawings, product details and workmanship can change the final requirement.
Bar weight follows the standard diameter-squared relationship, multiplied by length and quantity for a theoretical total.
Check actual diameter, cut lengths, laps, bends, chairs and a bar-bending schedule before ordering.
Theoretical straight-bar weight excludes detailing losses and should not replace an engineer-approved reinforcement schedule.
Use this calculator only for an early quantity estimate. A qualified civil or structural engineer must decide the final structure, reinforcement and safety details.
Approximate kg/m = diameter² ÷ 162
Check actual diameter, cut lengths, laps, bends, chairs and a bar-bending schedule before ordering.
Theoretical straight-bar weight excludes detailing losses and should not replace an engineer-approved reinforcement schedule.
This is an early quantity estimate. Site conditions, drawings, product details and workmanship can change the final requirement.