Gravel Calculator
Find how much river rock or gravel covers a bed. Enter the area and how deep you want the layer, and the volume and weight follow.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Volume is area times depth. Two inches is a common depth for decorative river rock. Use the depth of the finished layer, not the depth of the stones when they are piled up.
Weight is volume times the stone density. Rounded river stone weighs about 1,600 kilograms per cubic metre loose, which is about 100 pounds per cubic foot. Your supplier can give the exact figure for the stone you choose.
Worked example
A bed of 200 ft² covered 2 in deep needs 1.23 yd³ of stone, which weighs about 1.7 ton.
Questions
How deep should river rock be?
Two inches is common for decorative beds. Deeper layers use more stone, so check how much a load will cover before you order.
Does stone need fabric underneath?
Many people lay landscape fabric under stone to keep weeds down. This calculator counts only the stone.
Why show the weight?
Stone is sold by weight in some places and by volume in others. The weight helps when you check a truck or trailer load.
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