Calculate Your Project
Project Diagram
Total Volume
—Cubic Yards
Enter dimensions above
Estimated Weight
—Tons
Based on Compost density (0.6 t/yd³)
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Bagged Equivalent
— bags (2.0 cu ft)
Free Compost Calculator
Feed your garden the right amount.
Calculate exactly how much organic compost you need to amend your soil for maximum plant growth.
Compost Reference Guide
Compost Density & Weight Reference
| Measurement System | Total Volume | Estimated Weight |
|---|---|---|
| Imperial (US) | 1 Cubic Yards | 0.6 Tons (1,200 lbs) |
| Metric (EU) | 1 m³ | 0.78 Tonnes (785 kg) |
* Note: Exact weight can vary based on moisture content and compaction.
Recommended Depths for Compost
| Project / Use Case | Recommended Depth |
|---|---|
| Topdressing Lawns | 0.25–0.5 inches |
| Soil Amendment (Tilled) | 1–2 inches |
| Raised Bed Mix (50% blend) | 6 inches |
How to Calculate Compost Volume
Most landscaping suppliers sell compost by the cubic yard. To convert your project area to cubic yards, use this formula:
Volume (cu yd) = (Length × Width × Depth) ÷ 27
Our calculator also multiplies your cubic yard result by 0.6 tons/yd³ (the standard density for compost) to show estimated weight — essential if you are hauling the material yourself or need delivery pricing.
Pro Tips & Insights
1
For raised beds, a standard recipe is 50% topsoil, 30% compost, and 20% aeration material like perlite or sand.
2
When topdressing a lawn, aerate the soil first so the compost can reach the root zone.
3
Compost is very light compared to soil. A full cubic yard typically weighs between 1,000 and 1,200 lbs.
Frequently Asked Questions
How much compost do I need to amend my soil?▼
For general soil amendment, applying a 1 to 2-inch layer of compost and tilling it into the top 6 inches of soil provides excellent nutrient density. Use our calculator to find the cubic yardage for a 2-inch depth.
How many bags of compost are in a cubic yard?▼
A standard bag of compost from a garden center contains 1 cubic foot or 2 cubic feet of material. It takes 27 cubic feet to make a yard, meaning you need 13.5 (2 cu ft) bags to equal one cubic yard.
Can I plant directly in 100% compost?▼
No, planting in pure compost can burn plant roots due to high nutrient concentrations and poor drainage. Compost should always be mixed with topsoil or potting soil (usually no more than 30-50% compost).