Estimate only
This estimate uses the dimensions and allowance you enter. Measure the actual area and check the product label before buying gravel.
Gravel Calculator
Estimate the volume of gravel needed for a rectangular area at a chosen depth.
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About Gravel Calculator
Gravel Calculator estimates gravel volume in cubic metres and bulk bag tonnage required for garden paths, driveways, and decorative borders.
How to use Gravel Calculator
- Enter path or driveway length and width in metres.
- Select layer depth (typically 3cm to 5cm for paths, 5cm for driveways).
- Click Calculate to calculate gravel volume and weight in tonnes.
- Review 850kg bulk bag counts.
Examples
Driveway Section: 10m x 3m (30m² area), Depth: 5cm Result: 1.50 cubic metres of gravel (approx 2.4 tonnes / 3 bulk bags).
FAQ
How much does one bulk bag of gravel weigh?
A standard bulk bag of aggregate gravel weighs approximately 850kg (0.85 tonnes).
Is a weed membrane required under gravel?
Yes. Laying a heavy-duty geotextile weed membrane under gravel prevents weeds from growing through from the subsoil.