Gravel & Aggregate Calculator
By Santaji GadepatilinUpdated October 27, 2026
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Type in any field to change it. Press × on a value to calculate that field instead.
How to use this calculator
Enter the length, width and depth, and choose the material. The volume and weight are calculated.
Example
A 10 × 3 m path, 75 mm deep:
- Volume = 10 × 3 × 0.075 = 2.25 m³ (2.94 yd³)
- Gravel weight ≈ 2.25 × 1.6 = 3.60 tonnes
Typical depths
| Use | Depth |
|---|---|
| Decorative garden cover | 30–50 mm |
| Footpath | 50–75 mm |
| Driveway (total) | 150–200 mm |
| Mulch for beds | 50–75 mm |
Frequently asked questions
How deep should a gravel driveway be?
Typically 100–150 mm (4–6 in) of compacted base plus a 50 mm top layer. Paths need around 50–75 mm.
How many tonnes is a cubic metre of gravel?
About 1.5–1.7 tonnes, depending on the stone and moisture.
Should I order extra?
Yes, about 5–10%, because gravel settles and compacts.