How to Incubate and Hatch Chicken Eggs: A Complete Guide

There’s something almost magical about watching a fluffy chick break through its shell after 21 days of careful incubation. Whether you’re looking to expand your flock, hatch rare heritage breeds, or simply experience one of the most rewarding parts of homesteading, incubating eggs at home is entirely doable — even for beginners.

I hatched my first batch of eggs in a bargain-bin still-air incubator propped on my kitchen counter, and despite every mistake in the book, 9 out of 12 eggs hatched. Since then, I’ve refined my process significantly. This guide covers everything I wish someone had told me from the start — from choosing an incubator to handling those nerve-wracking final hours of hatch day.

Choosing Your Incubator

The incubator you select will shape your entire hatching experience. There are two main types to consider, and your budget and commitment level should guide the decision.

Still-Air Incubators

Still-air incubators are the budget-friendly entry point, typically running $40-$80. They don’t have an internal fan, which means temperature can vary by several degrees at different spots inside the unit. If you go this route, measure temperature at the top of the eggs — you’ll want it reading about 101-102°F at that point, since heat rises and the air near the heating element will be warmer than at egg level.

Forced-Air Incubators

Forced-air models include a fan that circulates air evenly throughout the chamber. They’re more forgiving and consistent, and they’re what I’d recommend if you plan to hatch more than once or twice. Target 99.5°F with a forced-air model. Good ones with automatic turners run $100-$250, and the investment pays for itself in higher hatch rates.

Automatic vs. Manual Turning

Automatic egg turners are a game-changer for busy homesteaders. They gently rock eggs back and forth throughout the day, mimicking what a broody hen does naturally. If your incubator doesn’t include one, you’ll be manually turning eggs at least 3 times per day — including weekends and holidays. Mark each egg with an X on one side and an O on the other so you can track which ones you’ve turned.

Feature	Still-Air	Forced-Air
Cost	$40–$80	$100–$250+
Temperature Target	101–102°F (top of eggs)	99.5°F
Consistency	Variable — hot/cold spots	Even throughout
Hatch Rate (typical)	50–70%	70–90%
Best For	Small batches, trial runs	Regular hatching, larger batches

Selecting and Storing Hatching Eggs

Not every egg is a good candidate for incubation. Whether you’re collecting from your own flock or ordering from a breeder, egg quality matters enormously.

What to Look For

Choose eggs that are clean, normal-sized, and free of cracks or deformities. Avoid eggs that are unusually large (often double-yolkers, which rarely hatch successfully), extremely small, or have thin or rough shells. If you’re collecting from your own backyard flock, make sure you have a rooster — sounds obvious, but I’ve had more than one friend try incubating unfertilized eggs.

Storing Eggs Before Incubation

Hatching eggs can be stored for up to 7 days before incubation with good results. After 7 days, hatch rates start declining noticeably. Store them pointed-end down in an egg carton at 50-60°F (a cool basement or spare room works well). Tilt the carton once or twice a day by propping one end up with a book, then switching sides. This prevents the embryo from sticking to the shell membrane.

I once tried incubating eggs that had been shipped across the country and sat in my post office for an extra weekend. Out of 24 eggs, only 6 hatched. Now I always let shipped eggs rest pointed-end down for 12-24 hours before setting them in the incubator — it gives the air cell time to settle after all that jostling.

Setting Up Your Incubator

Don’t wait until your eggs arrive to get the incubator running. You need at least 24-48 hours to stabilize temperature and humidity before adding eggs.

Location Matters

Place your incubator in a room with a stable temperature — ideally 65-75°F. Avoid spots near windows (direct sunlight causes temperature spikes), exterior doors (drafts), or heating vents. A spare bedroom or home office usually works perfectly. The more stable the room temperature, the easier it is for your incubator to maintain consistent conditions.

Calibrate Your Thermometer

The built-in thermometers on budget incubators are notoriously inaccurate. Buy a separate digital thermometer/hygrometer and verify readings against each other. A one-degree difference might not sound like much, but over 21 days, it can mean the difference between a great hatch and a total failure. I keep two independent thermometers in my incubator at all times.

Get Humidity Right

Most incubators have water channels or troughs in the bottom. Fill them according to the manufacturer’s instructions to achieve 45-50% relative humidity. You can increase humidity by filling more channels or adding a small sponge, and decrease it by reducing the water surface area. A hygrometer is essential — guessing at humidity doesn’t work.

The Incubation Period: Days 1-18

Once your incubator is stable, it’s time to set your eggs. Place them on their sides or, if using a turner, with the pointed end down. Record the date and mark your calendar for day 18 (lockdown) and day 21 (hatch day).

Daily Routine

Your daily tasks during incubation are straightforward but must be consistent:

• Check temperature — 99.5°F for forced-air, 101-102°F at egg level for still-air
• Check humidity — maintain 45-50% relative humidity
• Turn eggs — at least 3 times daily if turning manually (skip this if you have an automatic turner)
• Add water as needed to maintain humidity levels
• Vent briefly — opening the incubator for 30 seconds during turning provides fresh air exchange, just as a hen would do when leaving the nest to eat

Temperature Emergencies

If the temperature drops briefly — say from a power outage or accidentally leaving the lid off — don’t panic immediately. Eggs can tolerate short periods of cooling (a broody hen leaves the nest daily, after all). Extended high temperatures are far more dangerous. If your incubator spikes above 103°F for more than a couple of hours, embryo damage is likely.

Candling: Checking Embryo Development

Candling is the process of shining a bright light through the egg to see what’s happening inside. It’s both informative and fascinating — and it helps you identify eggs that need to be removed before they go bad inside the incubator.

When to Candle

The two most useful candling times are day 7 and day 14. On day 7, you should see a spider web of blood vessels and a small dark embryo. On day 14, the embryo fills much of the egg, and you’ll see movement in viable eggs. You can candle more often, but each time you handle eggs and open the incubator, you’re disrupting conditions slightly.

What You’re Looking For

Observation	What It Means	Action
Clear egg, no veins (day 7)	Infertile or very early death	Remove from incubator
Blood ring (red circle)	Early embryo death	Remove immediately
Dark spot with veins radiating out	Developing embryo — healthy	Return to incubator
Large dark mass, air cell visible (day 14)	Well-developed embryo	Return to incubator
Dark with no visible air cell, possible odor	Dead embryo or rotten egg	Remove carefully

Dark-shelled eggs from breeds like Marans or Welsummers are much harder to candle. Use the brightest flashlight you have, and work in a completely dark room. If you’re hatching heritage breeds with dark eggs, you may only be able to confirm development at later candling dates.

Lockdown: Days 18-21

Day 18 is “lockdown” — one of the most critical phases of incubation. This is when you make final preparations for the hatch.

What to Do on Day 18

• Stop turning eggs. Remove the automatic turner if you have one, and lay eggs on their sides on the incubator floor or a non-slip liner.
• Raise humidity to 65-70%. Fill all water channels and add wet sponges if needed. High humidity keeps the membrane pliable so chicks can pip and zip without getting stuck.
• Stop opening the incubator. From this point on, resist the temptation to open the lid. Every time you do, you lose humidity that takes time to rebuild.

Lockdown tested my patience more than any other phase. I’m a tinkerer by nature, and not touching the incubator for three days felt impossible. But the hatches where I left things alone had significantly better results than the ones where I kept peeking. Trust the process.

Hatch Day: What to Expect

Around day 19-21, the real excitement begins. Here’s the typical sequence of events:

Internal Pip

Before you see anything externally, the chick punctures the internal membrane and begins breathing the air in the air cell. You might hear faint peeping from inside the eggs. This is completely normal and incredibly exciting.

External Pip

The chick pushes its egg tooth (a small hard bump on the beak) through the shell, creating a small crack or hole. You’ll see a tiny crack, possibly with a bit of beak visible. The chick may rest for several hours after this initial pip — this is normal.

Zipping

The chick rotates inside the egg, creating a line of cracks around the circumference (called “zipping”). This can take anywhere from 30 minutes to several hours. Finally, the chick pushes the cap off and tumbles out — wet, exhausted, and utterly adorable.

When to Help (and When Not To)

The urge to assist struggling chicks is overwhelming, but intervening too early can cause bleeding from blood vessels that haven’t fully absorbed. A general guideline: if a chick has pipped externally but made no progress in 24 hours, it may need help. If the membrane appears dried out and shrink-wrapped around the chick, you can carefully moisten it with a warm, damp cloth and gently chip away shell — but proceed with extreme caution.

Healthy chicks should be left in the incubator until they’re fluffy and dry, which takes several hours. They don’t need food or water for the first 24-48 hours — they absorbed the yolk sac just before hatching, which sustains them. This is nature’s design to allow all eggs in a clutch to hatch before the hen leads the chicks to food and water.

After the Hatch: Brooder Setup

Once chicks are dry and active, move them to a prepared brooder. You’ll need:

• Heat source — a heat plate or heat lamp set to 95°F for the first week, then reduced by 5°F each week
• Chick starter feed — medicated or unmedicated, with 18-20% protein
• Clean water — use a shallow chick waterer with marbles in the tray to prevent drowning
• Bedding — paper towels for the first few days (so chicks learn what food is, not bedding), then pine shavings

As your chicks grow, you’ll transition them to a proper coop once they’re fully feathered at around 6-8 weeks, depending on the weather. Knowing the basics of chicken health will help you spot any problems early, and having a good feeding plan in place will set them up for a productive life.

Troubleshooting Common Incubation Problems

Low Hatch Rates

If fewer than 50% of your fertile eggs are hatching, look at temperature stability first. Even brief spikes above 103°F can be lethal. Next, check humidity — too low during lockdown is the most common cause of chicks that pip but can’t zip out.

Chicks Pipping but Not Hatching

This almost always points to low humidity during lockdown. The membrane dries out and shrink-wraps around the chick. For your next batch, bump lockdown humidity to 70% and add extra water sources.

Eggs Exploding

A rotten egg can actually burst inside the incubator, contaminating everything. This is why candling and removing dead embryos is so important. If you smell anything foul, investigate immediately.

Late Hatches

If eggs haven’t pipped by day 23, the incubation temperature was likely too low. Eggs incubated at slightly low temperatures develop slowly. Check your thermometer calibration for next time.

Using a Broody Hen Instead

If you have a reliably broody hen, she’ll do all this work for you — and usually with better results than any incubator. Breeds like Silkies, Cochins, and Orpingtons are known for going broody. A broody hen maintains perfect temperature and humidity, turns eggs instinctively, and raises the chicks after hatching. It’s nature’s incubator, and it’s remarkably effective.

The downside is that you can’t control when a hen goes broody, and she’ll stop laying during the brooding period. But if the timing works out, it’s the easiest way to hatch eggs by far.

How Many Eggs to Start With

For your first hatch, I’d recommend setting 12-24 eggs. This gives you a statistically meaningful batch (a few failures won’t feel devastating) while remaining manageable. Remember that roughly half will likely be roosters, so plan accordingly. If you can’t keep roosters, have a plan in place before you start — whether that’s rehoming, processing, or finding a friend who wants them.

Frequently Asked Questions

Can I incubate eggs from the grocery store?

Standard grocery store eggs are unfertilized and won’t develop. However, eggs labeled “fertile” from some specialty stores have occasionally been hatched by adventurous homesteaders. Your best bet is sourcing hatching eggs from a local breeder or your own flock with a rooster present.

What happens if the power goes out during incubation?

Short power outages of a few hours usually aren’t fatal to developing embryos — remember, a broody hen leaves the nest daily. Cover the incubator with towels to insulate it, and avoid opening it. If you live in an area with frequent outages, consider a small UPS (uninterruptible power supply) backup.

Can I incubate different breeds together?

Absolutely. As long as they’re all chicken eggs, they share the same incubation parameters (21 days, 99.5°F, same humidity). You can even incubate bantam and standard eggs together. Just be aware that some breeds hatch slightly earlier or later than average.

How can I tell if eggs are fertile before incubating?

You can crack open a few eggs from your flock and look at the germinal disc on the yolk. A fertile egg will have a small bullseye pattern (a white ring with a clear center), while an infertile egg shows only a small white dot. This sacrifices those eggs but confirms your rooster is doing his job.

Is it okay to candle eggs every day?

While daily candling won’t immediately harm eggs, the frequent handling and temperature disruption isn’t ideal. Stick to candling on days 7, 14, and optionally day 10. After day 18, don’t candle at all — eggs should remain undisturbed during lockdown.