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About this calculator

Use the Gravel Driveway Calculator to get 4 linked results (Gravel at 10 cm, Tonnes at 10 cm, Gravel at 15 cm, Tonnes at 15 cm) from a single number. It is built for home & construction jobs where a quick, repeatable answer beats guesswork. Gravel compacts about 15 to 20%; order extra if you will roll or plate-compact it.

How it works

The calculator multiplies your input by a fixed coefficient for each line. For example, every 1 m2 gives 0.1 m3 for gravel at 10 cm.

Worked example

If you enter 45 (Area (m2)), Gravel at 10 cm comes to 4.5 m3 and Tonnes at 15 cm comes to 10.8 t.

Common mistakes

• Gravel compacts about 15 to 20%; order extra if you will roll or plate-compact it.
• Skipping the check against local building code or manufacturer data.

FAQ

How much gravel at 10 cm do I need per m2?

Each 1 m2 gives 0.1 m3.

How is Tonnes at 15 cm calculated?

Tonnes at 15 cm equals your input times 0.24 t. With 45 entered, that is 10.8 t.

Are the results exact?

Results are precise sums of the stored coefficients, but real-world gravel at 10 cm varies, so keep a safety margin. This is general information, not professional advice.

What is the most common mistake?

Gravel compacts about 15 to 20%; order extra if you will roll or plate-compact it.

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