How Long Do Chicken Eggs Take to Hatch? Day-by-Day Guide
Chicken eggs take about 21 days to hatch at 99.5°F (37.5°C) in a forced-air incubator. Stop turning the eggs and raise humidity at lockdown on day 18. Bantam eggs can hatch a day early.
Day-by-day incubation timeline
| Day | What to do |
|---|---|
| Day 0 | Set the eggs, pointy end slightly down. Temperature 99.5°F forced-air, humidity 45–50%. |
| Days 1–17 | Turn eggs 3–5 times a day (an odd number, so they don't spend every night on the same side) or use an auto-turner. |
| Day 7 | Candle. Remove clear eggs (infertile) and eggs with a blood ring. |
| Day 14 | Candle again. Remove any that stopped developing. |
| Day 18 | Lockdown: stop turning, raise humidity to 65–70%, and keep the lid shut. |
| Days 20–21 | Pipping and hatching. Leave chicks in the incubator until they're dry and fluffy. |
Hatch times for other birds
| Bird | Days to hatch |
|---|---|
| Coturnix quail | 17–18 |
| Bantam chicken | about 20 |
| Chicken | 21 |
| Guinea fowl | 26–28 |
| Duck, turkey | 28 |
| Goose | 28–35 |
| Muscovy duck | 35 |
Why hatches run early or late
Temperature is the main cause. A few tenths of a degree too warm speeds hatching and can cause weak or deformed chicks. Too cool slows it down. Check your incubator with a second, trusted thermometer. Old eggs that were stored before setting also hatch a little later.
Common questions
Can chicken eggs hatch after 21 days?
Yes. If the temperature ran a little low, day 22–23 hatches are common. Candle before throwing out any egg.
Should I help a chick hatch?
Usually not. Most chicks take 12–24 hours from pip to hatch. Helping too early can cause bleeding. If a chick is clearly stuck after 24 hours, look up assisted hatching first.
Figures are typical values from university extension and breed-association guidance. Estimates only. Individual animals vary — confirm pregnancy and health questions with your veterinarian.