Gravel Calculator
Calculate how much gravel, stone, sand, topsoil or mulch you need with this free online gravel calculator, in cubic yards, tons, m³ or bags.
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Part of the toolkit
How to use Gravel Calculator
- 1Pick the material and your units (feet/inches/tons or meters/cm/tonnes)
- 2Enter the area's length and width and the depth you want — adjust the density if your supplier gives one
- 3Press Calculate to see cubic yards or m³, the weight in tons and how many bags
Frequently asked questions
How much gravel do I need for a 20×10 ft area?▾
At 3 inches deep that's 50 cubic feet = 1.85 cubic yards, or about 2.6 tons of gravel at a typical 1.4 tons per cubic yard.
How do I convert cubic yards to tons?▾
Multiply cubic yards by the material's density. Gravel and crushed stone are typically 1.3–1.5 tons per cubic yard, topsoil about 1.1 and mulch only about 0.4.
How deep should gravel be?▾
About 2 inches (5 cm) for paths and decorative beds, 3–4 inches (8–10 cm) for patios, and 4–6 inches or more in layers for driveways over a compacted base.
How deep should mulch be?▾
2–3 inches (5–8 cm) is usually enough to suppress weeds and keep moisture in; keep it away from tree trunks and plant stems.
Embed Gravel Calculator on your website▾
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