Rebar Calculator
Estimate total rebar length and approximate steel weight.
How to Use the Rebar Calculator
Enter bar diameter, length and quantity to estimate total rebar length and approximate weight.
Practical Example
If a project uses 20 bars that are each 6 m long, the total rebar length is 120 m before allowing for overlaps and cuts.
Factors That Affect the Result
Bar diameter, lap lengths, bends, hooks, spacing, waste and local structural requirements can change the final quantity and weight.
Frequently Asked Questions
Does diameter affect weight?
Yes. Larger-diameter bars weigh more per unit length.
Should lap lengths be included?
Yes when bars overlap in the actual installation.
Can this replace structural design?
No. It is a quantity estimate and not an engineering design tool.
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Rebar Estimation Tips
Enter slab or wall dimensions, bar spacing and layout direction to estimate total rebar length or quantity. Actual reinforcement plans may require laps, hooks, edge bars, chairs and additional steel around openings, so a basic grid estimate can be lower than the final construction quantity. Bar diameter also changes weight substantially. Use the calculator for material planning, then compare the result with the structural drawings and local code requirements before ordering reinforcement.