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Composting Calculator
Balance green and brown materials and estimate compost yield.
leaf Free Online Tool
⚡ Instant Results
📊 Clear Comparison
🔒 100% Free Tool
Blended ratio
Compare Your Options And Get Clear Answers
Balance green and brown materials and estimate compost yield.
Composting Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Blended ratio = weighted average of ratios by mass.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Composting Quick Guide
Typical values for reference.
| Green kg | Brown kg | Green C:N | Blend |
|---|---|---|---|
| 20 | 10 | 20 | 33.3:1 |
| 10 | 10 | 20 | 40.0:1 |
| 5 | 30 | 20 | 54.3:1 |
| 30 | 10 | 20 | 30.0:1 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Composting Calculator FAQ
Answers to common questions about this calculator.
About 25 to 30 parts carbon to 1 part nitrogen.
Too many greens; add browns and turn it.
Roughly a third of the input mass.
No, it is an estimate from typical ratios.