Calculator

C:N Ratio Calculator

Target a C:N ratio of ~30:1 for rapid thermal composting. This tool uses standard dry-weight ratios for common materials to help you balance your pile.

This calculator requires JavaScript. Standard rule: 50% greens (by volume) and 50% browns usually yields ~30:1 C:N.

Grass Clippings (15:1) Vol Parts: Kitchen Scraps (20:1) Vol Parts: Autumn Leaves (60:1) Vol Parts: Cardboard/Paper (200:1) Vol Parts:

C:N Ratio Calculator

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