Compost Calculator

Add your available materials — get live C:N ratio, moisture guide, output estimate, and turning schedule.

Target C:N ratio: 25–30:1 — This produces hot compost in 6–10 weeks that kills weed seeds and pathogens.

Your Batch Materials

🟢

Cow Dung (Fresh)

C:N = 22:1

🟤

Wheat Straw

C:N = 90:1

C:N Ratio: 30:1

Quantity: 50 kg

Carbon:Nitrogen Ratio

35.7:1

Slightly C-rich

15 (too N-rich)25–30 ✓50+ (too C-rich)

⚖️

200 kg

Total Input

🟢

100 kg

Green (N)

🟤

100 kg

Brown (C)

💧

~110 L

Water to Add

🌿

~90 kg

Expected Output

📅

~10 weeks

Ready In

• Week 1: Build pile, wet thoroughly, cover

• Week 2: First turn — check temp (55–65°C ideal)

• Week 3: Turn again — add water if dry

• Week 5: Turn — pile cooling, actinomycetes visible

• Week 7: Turn — pile maturing

• Week 10: Test — dark, crumbly, earthy smell = ready ✓

💡 Fix: Add more green material (cow dung, green leaves, kitchen waste) to lower C:N ratio.