Formula and method
Volume in m³ = length × width × depth × allowance factor. Metric tonnes = volume × density in kg/m³ ÷ 1,000.
Worked example
A 5 m × 4 m area at 5 cm depth, with 10% extra, needs 1.1 m³. At 1,600 kg/m³ this is 1.76 metric tonnes.
Gravel Calculator
Estimate gravel volume and mass using footprint, depth, allowance and the supplier’s bulk density.
Printed from Calxy · https://www.calxy.net/other/gravel-calculator
Gravel quantity including allowance1.1000 m³
m or ft
0.001 – 1000000000
m or ft
0.001 – 1000000000
cm or in
0.001 – 1000000000
%
0 – 100
kg/m³
1 – 10000
Gravel quantity including allowance
1.1000 m³
- Cubic yards1.4387
- Cubic feet38.8461
- Mass at entered bulk density1.7600 metric tonnes
Uniform rectangular fill estimate. Density depends on stone size, moisture and compaction; confirm the supplier’s density and ordering units.
How this was calculated
Convert length, width and thickness to meters.
Volume = length × width × depth × (1 + allowance/100).
Mass = volume × supplier bulk density.
Frequently asked questions
Is the density the same for every gravel?
No. Gradation, moisture and compaction change bulk density. Use supplier information and distinguish metric tonnes from US short tons.
Last updated . Results are estimates for informational purposes only.