TOOL 10 / FREE · NO SIGNUP
Gravel & Soil Calculator
Calculate volume from area and depth. Supply a bulk density only when you need estimated weight or mass-based bags.
Worked example loaded. These are example measurements and product assumptions.
THE METHOD
How to use this estimate
- Measure the area and uniform depth, or enter a known net area.
- The allowance applies to volume once. Compaction and settlement are not applied automatically.
- Choose bag volume or bag mass from the label. Mass-based bag counts require the supplied bulk density; mass alone does not establish volume.
order volume = net area × depth × (1 + allowance/100); mass = order volume × supplied bulk density
A worked example
The “Load worked example” button uses the same inputs as this example. Explicit unit suffixes keep their meaning in either unit system.
- Input method
- Length × width
- Length
- 5 m
- Width / wall height
- 4 m
- Uniform depth
- 50 mm
- Ordering allowance
- 10
- Bulk density (kg/m³ in every unit mode)
- 1600
- Bag purchasing basis
- Bag label states volume
- Volume per bag
- 25 l
- Measured volume
- 1 m³ / 35.315 ft³
- Weight at your supplied density
- 1,760 kg / 3,880.136 lb
- Bags
- 44
- Purchased bag volume
- 1.1 m³ / 38.846 ft³
Questions, answered
Can I calculate without a density?
Yes. The volume and volume-labeled bag count work without inventing a weight.
Why are mass-based and volume-based bags different?
They describe different purchasing units. Choose the actual package and use compatible supplier data.
Sources and product assumptions
These references explain units or product specifications. Your selected product label takes priority; none of these sources endorses this calculator.
Source check: 4 October 2026. Worked examples use stated, editable assumptions.