Expected Chicks
15
Hatch Rate
76%
Fertile Eggs
20
Days
21
Expected Chicks
15
76% estimated hatch rate
Fertile Eggs
20
Incubation
21 days
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Price as of Jun 27, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
Fertile = 24 × 0.85 = 20. Rate = 80 × 0.95 = 76%. Chicks = 20 × 0.76 = 15.
Inputs
Result
Fertile = 12 x 0.80 = 10. Rate = 75 x 0.85 = 63.75. Chicks = 10 x 0.64 = 6.
Chicken eggs need 99.5°F (37.5°C) in a forced-air incubator or 101°F (38.3°C) in a still-air incubator. Even 1°F deviation reduces hatch rates by about 10%. Maintain temperature within 0.5°F for best results.
Chicken eggs need 45–55% relative humidity for days 1–18 and 65–75% for lockdown (days 18–21). Low humidity causes chicks to stick to the membrane. High humidity causes drowning in the shell.
| Species | Temp (°F) | Humidity | Lockdown RH |
|---|---|---|---|
| Chicken | 99.5 | 50% | 65% |
| Duck | 99.5 | 55% | 75% |
| Quail | 99.5 | 50% | 65% |
| Turkey | 99.5 | 55% | 70% |
Turn eggs at least 3 times per day (always odd number so eggs alternate sides overnight). Auto-turners rotate every 1–2 hours. Stop turning 3 days before hatch date (lockdown).
Eggs stored more than 7 days before incubation lose about 1% hatch rate per day. Ideal storage is 3–7 days at 55–60°F with 75% humidity, pointed end down. Eggs over 14 days old have significantly reduced viability.
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Last Updated: Jul 13, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.
