Example 1 — 10×3 m path
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3.15 m³
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Gravel calculator
Estimate gravel volume and mass for driveways, paths or base layers — with waste %, tonnes and optional bulk bags.
Results are indicative. Loose and compacted gravel differ in density; suppliers may sell by the tonne or bulk bag. Also see concrete volume and sand.
Results
Enter data and click Calculate.
How results are calculated
V = length × width × depth × (1 + waste/100). Mass = V × density (kg/m³, SI). Bulk bags = ceil(V ÷ bag volume). Small bags = ceil(mass ÷ bag size).
Density stays in kg/m³ even with US length units — common for bulk deliveries. Mass is an estimate: moisture and compaction can change it.
How to use this calculator
- Enter length, width and layer depth in the units from the header.
- Set waste % (often 5–10% for spill and compaction).
- Pick a density preset or enter custom kg/m³ (SI).
- Optionally add bulk bag, small bag and price — get volume, tonnes and cost.
Practical tips
- Path: often about 50–100 mm of gravel over geotextile and a compacted base.
- Driveway: typically thicker (about 100–150 mm) plus a proper sub-base for vehicles.
- Buying: compare price per m³, per tonne and per bulk bag — density changes the maths.
Usage examples
Example 2 — Driveway strip
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5.28 m³
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Example 3 — Small pad
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0.84 m³
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Frequently asked questions
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