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About Compost C:N Calculator

The perfect compost pile has a Carbon-to-Nitrogen ratio of roughly 25:1 to 30:1. Too much Nitrogen = smelly slime. Too much Carbon = slow decomposition.

Common Materials

  • Browns (Carbon): Leaves (60:1), Sawdust (400:1), Paper (170:1).
  • Greens (Nitrogen): Grass Clippings (20:1), Kitchen Scraps (15:1), Manure (15:1).

How to Use

Enter the volumes (buckets) of "Green" and "Brown" materials you have. The tool estimates the resulting pile ratio.