Ordering gravel for a driveway, path or patio? Our free Gravel Calculator turns your area and depth into cubic feet, cubic yards and an estimated weight in tonnes — so you order the right amount first time.
Based on an average density of 1.4 tonnes per cubic yard for loose gravel. Add 5–10% extra for compaction and uneven ground. Everything runs in your browser; nothing is uploaded.
How to Use
- Measure the length and width of the area in feet.
- Enter how deep you want the gravel layer in inches.
- Click Calculate to see the volume and estimated weight.
- Use the cubic yard figure when ordering loose loads from a supplier.
- Use the bag count when buying pre-packed bags from a garden centre.
Key Features
- Volume in cubic feet and cubic yards.
- Estimated weight in tonnes for loose orders.
- Approximate 20 kg bag count for retail buying.
- Works for driveways, paths, patios and garden beds.
- 100% private — all calculations happen in your browser.
FAQs
How much gravel do I need?
Multiply length × width × depth (all in feet) for cubic feet, then divide by 27 for cubic yards. The calculator above does the maths for you, including the inches-to-feet depth conversion.
How many tonnes are in a cubic yard of gravel?
About 1.4 tonnes for typical loose gravel. Dense crushed stone can be heavier, so treat the weight as an estimate and confirm with your supplier.
What depth should a gravel driveway be?
3 to 4 inches of compacted gravel over a firm sub-base is standard for cars. Go deeper (5–6 inches) for heavy vehicles or soft ground.
Should I allow extra for compaction?
Yes — order 5–10% more than the calculated volume. Gravel settles and compacts, and ground is rarely perfectly level.
Is my project data sent anywhere?
No. The calculator runs entirely in your browser with JavaScript, so your measurements never leave your device.
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