Gravel Calculator
Estimate gravel, crushed stone, or aggregate needed for driveways, paths, or landscaping.
Gravel Required
How to use the Gravel Calculator
- Enter the length and width of the area in metres.
- Enter the depth in centimetres.
- Click Calculate to get the volume in m³ and approximate weight in tonnes.
- Add 5–10% extra for compaction and uneven ground.
Formula used
Loose gravel weighs roughly 1.5–1.7 tonnes per cubic metre; the calculator uses 1.6 t/m³.
Worked example
Driveway 6 m × 3 m, 10 cm deep
Volume = 6 × 3 × 0.10 = 1.8 m³
Weight ≈ 1.8 × 1.6 = 2.9 tonnes
In cubic feet: 1.8 × 35.31 ≈ 63.6 cft
Recommended depths
Garden paths: 5–7 cm. Driveways for cars: 10–15 cm, usually in two layers with larger stone (40 mm) at the bottom and smaller (20 mm) on top. Sub-base under concrete or pavers: 10–15 cm, compacted. In India aggregate is often sold by the brass (100 cft ≈ 2.83 m³) or by the tractor-load, so convert before ordering.
Tips for accurate results
- Lay a geotextile sheet underneath to stop weeds and sinking.
- Compact each layer with a plate compactor.
- Wet gravel is heavier; actual weight may differ from the estimate.
Frequently Asked Questions
About 1.5–1.7 tonnes for dry loose gravel.
1 brass = 100 cubic feet ≈ 2.83 m³.
Around 10–15 cm for regular car use.
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Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026