Drainage Gravel Calculator
Estimate drainage gravel for trenches, soakaways and backfill zones.
Drainage gravel for a 2m by 1m area at 50mm
For an area measuring 2 metres by 1 metres at 50mm deep, this estimate includes drainage aggregate volume and tonnage using the default density below.
- Volume0.10 m³
- Approx tonnage0.16 tonnes
- Including wastage0.18 tonnes
Results - Drainage Gravel Calculator
- Volume0.10 m³
- Approx tonnage0.16 tonnes
- Including wastage0.18 tonnes
How this drainage gravel calculator works
It converts trench or soakaway dimensions into a volume, then into tonnage using a practical drainage aggregate density.
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Pre-filled calculator pages help visitors jump straight to a useful estimate and then refine the result if needed.