Boiled Egg Timer Calculator
Perfect eggs every time: choose egg size and how runny you like the yolk, add your altitude, and get the exact minutes from a rolling boil.
Enter values to see the result.
How to use
- Choose the egg size and your preferred doneness.
- Enter your altitude if you live in a hilly area — water boils cooler there, so eggs need longer.
- Lower the eggs into already boiling water, start the time shown, then cool in cold water to stop cooking.
Base times for a medium egg at sea level, lowered into boiling water: soft 6 minutes, medium (jammy) 8 minutes, hard 11 minutes. Large eggs add about 1 minute, small eggs need about 1 minute less, and every 1000 m of altitude adds roughly 30 seconds because boiling water is cooler.