Organic Soil Amendment Estimator
Calculate exactly how much organic soil amendment you need for your garden or farm project
How to Use This Calculator
- Measure the length and width of your garden area in feet
- Determine how deep you want to apply the amendment (typically 2-6 inches)
- Select your amendment type or enter custom density
- Click “Calculate” to get precise measurements
Expert Tips
- For vegetable gardens, 3-4 inches of compost is ideal
- For lawns, 1/4-1/2 inch is sufficient when topdressing
- Always moisten dry amendments before application
- Test your soil first to determine what amendments are needed
Frequently Asked Questions
Our calculator provides professional-grade estimates based on standard industry calculations. Actual needs may vary slightly based on amendment moisture content and compaction.
Cubic yards measure volume while tons measure weight. Different amendments have different densities, so we provide both measurements for your convenience.
Most gardens benefit from annual amendments. Heavy clay or sandy soils may need more frequent amendments (2-3 times per year) until soil structure improves.
Yes! Many gardeners combine amendments like compost and biochar. Calculate each separately, then combine in your preferred ratio.
