Egg Boiling Calculator – Perfect Eggs Every Time
The egg boiling calculator calculates precise cooking time for desired doneness (soft, medium, hard-boiled) based on egg size and initial temperature. No more overcooked eggs.
The tool considers egg size (small, medium, large, extra large), whether it's straight from the fridge or room temperature, and altitude (air pressure affects water's boiling point). Timer starts automatically after calculation.
How long to boil an egg soft?
Fridge-cold large egg: soft (runny yolk) 7 min, medium (semi-runny) 9 min, hard-boiled 12 min. Room temperature eggs cook about 1–2 minutes faster. At high altitude (over 3,300 ft) add 1–2 minutes, as water boils at lower temperature.
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Browse all tools →Egg boiling calculator tells you the precise cooking time for eggs to your desired doneness level. A handy kitchen helper for anyone wanting perfect soft, medium, or hard-boiled eggs.
Choose desired doneness level and egg size, and the calculator tells you cooking time in minutes.
- Select doneness level: soft, medium, or hard-boiled.
- Account for egg size (S, M, L, XL) in cooking time calculation.
- Get precise cooking time and start a timer directly.
Cooking time is guidance for boiling water with refrigerator-cold eggs – initial conditions affect results.
- Room temperature eggs cook faster than refrigerator-cold ones.
- High altitude (mountains) lowers water boiling point and extends time.
- Cooling with cold water stops cooking at the desired point.
The perfect egg is a matter of taste – experiment and adjust time to your preference.
- First time, try with one egg before cooking a larger batch.
- Fresh eggs are harder to peel than eggs a few days old.
- Cooking time is an estimate – stoves and pots vary.