1. Enter your measurements
Change values for instant estimates. Example prices and product sizes are editable, not supplier quotes. Check packaging and fitting requirements.
m
m
mm
%
litres
£
2. Your estimate
Printable shopping list
Illustrative estimates only. Check supplier specifications, site conditions and local requirements before ordering or building.
How to use the compost calculator
Estimate compost volume and realistic litre bag quantities. Enter your actual product pack sizes, yields and prices. These are planning estimates, not supplier quotes. Verify installation requirements and manufacturer specifications.