Work out kerb stone quantity instantly with clear inputs, formula shown and shareable results.
Kerb quantity is the total run divided by the unit length, doubled where both sides of the carriageway are kerbed, plus a small breakage allowance. Bedding and haunching concrete is roughly 0.045 cubic metres per metre of kerb for a standard 150 mm bed with a rear haunch.
Kerb units
Units = road length x sides / unit length x (1 + breakage)
Bedding concrete
m³ = total run x 0.045
Units = road length x sides / unit length x (1 + breakage). Kerb quantity is the total run divided by the unit length, doubled where both sides of the carriageway are kerbed, plus a small breakage allowance.
Yes. Curves need shorter radius units and more of them per metre of arc, and transitions and drop kerbs at crossings are counted separately.
This calculator takes 4 inputs: Road length, Kerb unit length, Sides to kerb, Breakage allowance. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.