Gravel Calculator
Estimate how much gravel, shingle or aggregate you need for a rectangular area.
Check the supplier's figure for your aggregate.
Enter the measurements and press Calculate.
How the gravel calculation works
Length × width × depth gives the volume in cubic metres. The calculator then applies the chosen bulk density and waste allowance to estimate tonnes.
Choosing a depth
The required depth depends on the intended use and aggregate size. Decorative gravel, paths, drainage layers and driveways can require very different build-ups.
This calculator estimates material quantity only. Ground preparation, compaction, sub-base construction and drainage requirements depend on the project.
Frequently asked questions
Why are tonnes only approximate?
The same volume can weigh differently depending on aggregate type, grading, voids and moisture content.
Can I use this for MOT Type 1?
Yes for a volume-to-weight estimate, but enter an appropriate density and remember compacted thickness may differ from loose-delivered thickness.