Compost Builder Calculator

Add kitchen scraps, browns, and natural boosters to estimate finished compost volume, C:N balance, a practical timeline, and an educational compost-quality profile.

Inputs

interactive
Kitchen scraps (mostly “greens”)
Browns (carbon sources)
Natural boosters (optional)
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This calculator provides educational estimates (not lab results). Real compost varies with materials, moisture, airflow, and management.

Results

Finished compost volume (estimate)
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Compost timeline (estimate)
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Carbon : Nitrogen balance
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Too green (smelly) Ideal (≈25–30:1) Too brown (slow)
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Compost quality (educational estimate)
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Nutrient profile (est. % of finished compost)
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Add ingredients on the left, then click Calculate.
Alerts & tips
As you add ingredients, this section will show balancing tips (like adding browns if you’re too green).