Gravel and Aggregate Calculator
Tonnes and cubic metres of gravel for a given area and depth, with the cost.
Results
Mass
3.840
t
Volume
2.400
m³
Total cost
134.40
What this tool does
Aggregates are ordered by weight but spread by volume, and the bridge between the two is bulk density — around 1.5–1.7 t/m³ for most gravels, higher for wet or fine material. Check the supplier's figure if the quantity is large.
Formula
mass = area × thickness × apparent density
Variables
| Symbol | Meaning | Unit |
|---|---|---|
a | Area | m² |
h | Thickness | cm |
d | Density | t/m³ |
p | Unit price | — |
M | Mass | t |
V | Volume | m³ |
C | Total cost | — |
Worked example
- Area30 m²
- Thickness8 cm
- Density1.6 t/m³
- Unit price35
- Mass3.840 t
- Volume2.400 m³
- Total cost134.40
Limitations
- Density changes with temperature, moisture and composition. Use a value from the supplier's data sheet whenever precision matters.
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- The tool works with whatever currency you use for the inputs; it does not convert between currencies.