Aggregate Calculator
Work out volume and approximate tonnes of aggregate needed for driveways, paths and bases. Free.
e.g. 0.05–0.1 m for paths
Typical 1.4–1.8
Aggregate calculator
Use this aggregate calculator to estimate how much aggregate you need. Enter the length, width and depth of the area (e.g. driveway or path base) in metres or feet. You get the volume in cubic metres and an approximate weight in tonnes. Add a little extra for compaction and waste. Density varies by product; adjust if you know your aggregate type.
Frequently Asked Questions
How much aggregate do I need?
Enter length, width and depth of the area (e.g. driveway or base). The calculator gives volume in cubic metres and an approximate weight in tonnes using a typical density. Order slightly more for compaction and waste.
What is aggregate used for?
Aggregate (e.g. MOT type 1, gravel, sharp sand) is used for driveways, paths, bases under paving and concrete, and drainage. Depth depends on use; 50–100mm is common for paths.
Is the aggregate calculator free?
Yes. Free to use. Densities vary by product; the result is an estimate.
How many tonnes in a cubic metre of aggregate?
Roughly 1.4–1.8 tonnes per m³ depending on type (e.g. gravel vs sand). The calculator uses a default you can adjust.
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