Rebar Length, Stock Bar and Weight Calculator
Calculate reinforcement length with lap allowance, whole stock bars and approximate steel weight.
Formula
Planning estimate. Check product specifications and local requirements before purchasing.
Worked example: Rebar Calculator
Measurements in this example
| Required bar length | 180 m |
|---|---|
| Piece length | 12 m |
| Lap and cutting allowance | 12 % |
| Bar weight per metre | 0.888 kg/m |
Calculated quantities
| Length with allowance | 201.6 m |
|---|---|
| Whole stock bars | 17 |
| Estimated mass | 179 kg |
What to check
This calculation uses: Required bar length, Piece length, Lap and cutting allowance, Bar weight per metre. It returns: Length with allowance, Whole stock bars, Estimated mass.
Use dimensions from the structural drawings and check excavation against them before concrete or steel is ordered.
Foundation size, reinforcement, cover, joints and bearing conditions are structural decisions that require a qualified design.
Use the units beside each field. The values in the worked example are starting inputs; replace them with your measurements and the specifications of your material.
Compare alternatives
Open a tool, enter your measured dimensions, then save an estimate. Keep another version if you want to compare products or allowances.