Gravel Calculator
Calculate how much gravel you need for a driveway, path, or landscaping.
Area & Depth
Your Results
Gravel ~1.5-1.7 tonnes per m³. Buy 10% extra.
What is a Gravel Calculator?
A gravel calculator estimates the volume and weight of gravel needed for a project—driveways, paths, landscaping, or drainage. Enter the area dimensions and depth to get cubic metres (or yards) and approximate tonnes required.
The Formula
Volume = Length × Width × Depth
Weight ≈ Volume × 1.6 tonnes/m³ (gravel density varies; 1.5–1.7 is typical)
Typical Depths
| Use | Depth |
|---|---|
| Path | 5-7.5 cm |
| Driveway | 7.5-10 cm |
| Driveway (heavy use) | 10-15 cm |
Example
- Area: 5m × 3m, depth 5cm
- Volume: 5 × 3 × 0.05 = 0.75 m³
- Weight: ~1.2 tonnes
Frequently Asked Questions
How much gravel do I need for a driveway?
For a 10m × 4m driveway at 10cm depth: 10 × 4 × 0.10 = 4 m³, ~6.4 tonnes.
Should I buy extra?
Yes. Buy 10% extra for compaction, uneven ground, and wastage.
What’s the density of gravel?
Typically 1.5–1.7 tonnes per m³ depending on type and compaction. We use 1.6 as an average.
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