How Long Do Chicken Eggs Take to Hatch? The 21-Day Timeline
Edited by Jennifer Bryant · Poultry breeder, Animal Science graduate, and Poultry Nerds Podcast co-host.
Chicken eggs take about 21 days to hatch. A few chicks may show up a day early or a day late, so don't panic if your whole batch doesn't pop out right on schedule.
Three weeks from a plain-looking egg to a fluffy, peeping chick. It's one of the best shows in the backyard.
Your 21-Day Timeline
Days 1 to 18: Keep it cozy and steady. In an incubator with a fan (called forced-air), aim for about 99.5°F. A still-air incubator, with no fan, runs warmer: about 102°F, measured at the top of the eggs. Too hot is more dangerous than a little cool, so check your thermometer often.
Turn the eggs at least three times a day, or let an automatic turner do it. Turning helps keep the growing chick properly positioned inside the egg.
Around day 7: Peek inside. Many hatchers candle now. That means shining a bright light through the shell in a dark room. If you see a spidery web of tiny blood vessels, a chick is growing. An egg that looks clear may not be fertile, or it may have stopped early. If you're unsure, check it again in a few days before you toss it.
Day 18: Lockdown! Stop turning, raise the humidity according to your incubator’s instructions, and close the lid. Keep the ventilation openings clear so chicks have fresh air. From here on, try hard not to open the incubator. Every peek lets out the warm, moist air chicks need to hatch.
Days 20 to 21: Pip, pip, hooray! Chicks break into the air space inside the egg, then poke a tiny hole in the shell. That first hole is called a pip. You may hear peeping from inside the egg, which never stops being magical.
After the first pip, a chick often takes 12 to 24 hours, sometimes longer, to finish hatching. It rests a lot. That's normal hard work, not trouble.
What If My Eggs Are Late?
Temperature is the usual reason. A cool incubator slows chicks down, and a warm one speeds them up. Either way, hatching can drift a day or two off schedule.
So give late eggs a couple of extra days before you give up. If chicks still haven't hatched a day or two after that, they most likely won't.
Should You Help a Chick Hatch?
It's so hard to watch a chick struggle! But most of the time, the best help is no help. Pulling a chick out early can tear blood vessels it still needs, and can seriously injure the chick. Keep the lid closed and let it work.
One Quick Warning
These days are for chicken eggs only. Ducks, turkeys, and quail all run on different timelines, so check the right number before you set other eggs.
Want to Hatch With Confidence?
Hatching is much easier when you know what each stage looks like. Incubation Masterclass is made to help new hatchers learn incubation step by step, so you know what to do before day 1.
