🥚 Calculate Boiling Time

Egg Starting Temperature

Egg Size

Altitude (feet above sea level)

Desired Doneness

✅ Boiling Instructions

Boiling Time—

Water Temperature—

Ice Bath Time—

Peelability—

Start timing when water returns to a full rolling boil after adding eggs. At high altitude, water boils at a lower temperature, so eggs need slightly more time.

How to Use This Egg Boiling Calculator

Boiling an egg seems simple, but three variables dramatically change the result: starting temperature (fridge-cold vs room temp), egg size (heat penetration distance), and altitude (boiling point of water). This calculator accounts for all three.

The Science of Boiled Eggs

Egg whites (albumen) begin to set at 144–158°F (62–70°C). Yolks begin to set at 149–158°F (65–70°C) and become fully firm around 170°F (77°C). The key to a perfect egg is controlling how much heat reaches the center over time.

Step-by-Step for Perfect Eggs

Use a needle or pin to prick the wide end of the egg. This releases air pocket pressure and reduces cracking.
Bring water to a rolling boil first (for hard-boiled) or start cold (for soft-boiled, optional). This calculator assumes boiling-water start for consistent timing.
Lower eggs gently with a spoon to prevent cracking from the drop.
Start timing immediately when the water returns to a full boil.
Shock in ice water for at least 5 minutes. This stops cooking, firms the white for easier peeling, and prevents the green sulfur ring around the yolk.
Peel under running water — the water helps separate the membrane from the white.

Egg Boiling Time Chart (Sea Level, Large Eggs)

3 minutes: White barely set, yolk completely liquid
4 minutes: White set, yolk very runny (classic soft-boiled)
6 minutes: White firm, yolk jammy and custard-like (ramen egg)
8 minutes: White firm, yolk mostly set with slight softness in center
10 minutes: Yolk fully set, moist center
12 minutes: Fully hard-boiled, yolk slightly chalky
14+ minutes: Hard-boiled, risk of green ring forming

Frequently Asked Questions

Why do my hard-boiled eggs have a green ring around the yolk?

That is ferrous sulfide, caused by overcooking or not cooling quickly enough. It is harmless but unsightly. Use the calculator’s recommended time and shock in ice water immediately.

Are fresh eggs or older eggs easier to peel?

Older eggs (7–10 days old) are easier to peel because the pH of the white increases, loosening the membrane from the shell. Fresh eggs are delicious but notoriously hard to peel.

Does altitude really matter for boiling eggs?

Yes. At 5,000 ft, water boils at 203°F instead of 212°F. The lower temperature means heat penetrates slower, so you need about 10% more time. This calculator applies that adjustment automatically.

Can I make soft-boiled eggs in an Instant Pot?

Yes. Use the Egg Boiling Calculator for stovetop timing, or use the Instant Pot Converter for pressure-cooked eggs (typically 2–5 minutes on High Pressure + quick release).

Related Tools

Check out the Sous Vide Calculator for the ultimate custard-style eggs at 145°F, or the Microwave Converter for quick reheating.

Egg Boiling Calculator