Work out rebar bending schedule instantly with clear inputs, formula shown and shareable results.
Cutting length is the straight length between covers plus the hook extensions, minus a bend deduction because steel follows the inside of a bend rather than the sharp corner drawn on the schedule. Deductions are conventionally two diameters per 90 degree bend and three for a 180 degree hook.
Cutting length
L = (span - 2 x cover) + 2 x hook extension - bend deductions
Weight
kg = d² / 162 x cutting length in metres
Preliminary estimate only. Bar bending schedules must follow the detailing code in force and be checked against the structural drawings.
L = (span - 2 x cover) + 2 x hook extension - bend deductions. Cutting length is the straight length between covers plus the hook extensions, minus a bend deduction because steel follows the inside of a bend rather than the sharp corner drawn on the schedule.
The scheduled dimensions are outside-to-outside. The bar itself travels a shorter curved path, so cutting to the scheduled sum would leave every bar slightly too long.
This calculator takes 4 inputs: Bar diameter, Clear span or member length, Cover at each end, End treatment. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.