Hardcore Calculator
Work out the hardcore volume and estimated weight for a sub-base.
Volume
4.5m³
- Estimated weight
- 8.1 tonnes
Weight assumes crushed hardcore at about 1.8 tonnes per cubic metre.
v1.0 · Reviewed September 2026
How this is worked out
Volume is area × depth, converted to tonnes at 1.8 tonnes per cubic metre for crushed hardcore.
Worked example
- Area 30 m²
- Depth 150 mm
30 × 0.15 = 4.5 m³, and 4.5 × 1.8 = 8.1 tonnes
4.5 m³, weighing about 8.1 tonnes
Assumptions and limits
- Crushed hardcore varies widely in density depending on what it is made from, so the weight is approximate.
- The depth is the compacted depth.