Spawn Rate Calculator
Enter your total wet substrate weight and target spawn rate to compute the required spawn. Supports ounces, pounds, and kilograms.
%
| Rate | 5% | 10% | 15% | 20% |
|---|---|---|---|---|
| Amount |
Formula: spawn = substrate_weight × (spawn% ÷ 100)
Usage Notes
- Pasteurized oak sawdust: 10–15% spawn recommended.
- Sterilized substrate: 5–8% sufficient.
- Conversion: 16 oz = 1 lb; 1 lb ≈ 0.454 kg.
Higher spawn percentages shorten colonization time but slightly increase cost and block heat.
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