Overview
The Chicken is a landfowl, and its eggs hatch in about 21 days, with a normal window of days 20-22. Incubation difficulty is rated Beginner. Below you'll find the temperature, humidity, turning, candling and hatching steps for this species.

The most common poultry bird; the easiest and most forgiving species to start incubating.
The Chicken is a landfowl, and its eggs hatch in about 21 days, with a normal window of days 20-22. Incubation difficulty is rated Beginner. Below you'll find the temperature, humidity, turning, candling and hatching steps for this species.
In a forced-air (fan) incubator, hold the temperature steady at 37.2-37.8 °C and target 45-55% relative humidity in the first stage. Verify the readout with a reliable digital thermometer and hygrometer.
Turn the eggs an odd number of times per day, 5 times, so the embryo doesn't stick to the shell. Recommended candling days: 7, 14, 18. In a dark room, hold the egg to a strong light; a vein network and movement show fertility, and clear eggs should be removed.
On day 18, stop turning (lockdown), raise humidity to 65-75% and keep the incubator closed as much as possible. Hatching is expected on days 20-22; once chicks start pipping the shell, be patient, as hatching can take hours.
Leave the chicks in the incubator until their down dries and they perk up, then move them to a brooder kept at 35 °C for the first week, lowering the heat by about 3 °C each week. Provide clean water and quality starter feed at all times.
Chicken eggs usually hatch in 21 days, with a normal window of days 20-22.
In a forced-air incubator, 37.2-37.8 °C and 45-55% humidity are recommended; during lockdown humidity is raised to 65-75%.
Recommended candling days: 7, 14, 18. Remove any clear or non-developing eggs at these checks.