Rebar quantity calculator
Estimate one rectangular grid of straight bars from your spacing, cover and stock length.
Results
- Bars along length
- 16
- Bars along width
- 21
- Bar length in length direction
- 3.9 m
- Bar length in width direction
- 2.9 m
- Total bar length
- 123.3 m
- Stock pieces
- 27
- Estimated cost
- $270.00
- Steel mass
- 76.019081 kg
- Actual equal spacing · Bars along length
- 19.333333 cm
- Actual equal spacing · Bars along width
- 19.5 cm
Method · Limits
Usable dimensions subtract cover at both ends. Count in each direction = ceil(perpendicular span / spacing) + 1. Stock cutting is calculated separately for each direction; no shared offcuts, laps, hooks or saw allowance. Stock must fit each bar. Optional mass assumes circular steel at 7850 kg/m³; diameter 0 omits mass.
Inputs stay on this device. Files include your values; share them intentionally. This is geometry and purchasing arithmetic, not a structural or building-code assessment. Prices exclude tax and delivery.