Gravel Calculator
Estimate gravel volume and weight from length, width, depth, and your material’s bulk density.
Your result
Review your calculated values below.
Ready when you are.
Choose Calculate to see your result.
How to use this calculator
- Enter your values in the labeled fields, keeping the displayed units.
- Choose Calculate or press Enter in a single-line field.
- Review the result and the assumptions below before using it.
Formula and method
Volume = length × width × depth / 100. Mass = volume × density.
Worked example
A 5 m × 4 m bed at 10 cm depth requires 2 m³. At 1,600 kg/m³, that is 3.2 metric tonnes.
What the result assumes
The density is an editable example, not a universal gravel density. Moisture, grading, and compaction affect delivered quantities.
Common question
Should I use compacted or loose depth?
Use the depth corresponding to the density you enter and confirm ordering allowances with your supplier.