Calculate your quantity
Use your measured area and the actual product specification. The result updates as you change an input.
How this estimate works
Total fill volume is area × fill depth. The entered compost share divides that total; it is not a recommendation.
A calculated fill volume describes space, not a soil amendment recommendation. The correct mix and nutrient additions depend on the site and soil test.
Before you order
- Measure inside dimensions and usable fill depth.
- Ask what the soil or compost blend contains.
- Use soil testing and local growing advice before adding amendments.
Planning estimates can differ from delivered or installed quantities.
Reference
University of Minnesota Extension: Soil testing for lawns and gardens. Product specific rates and installation specifications take precedence over general defaults.