Cooking time depends on egg size and starting temperature. Plunging eggs into iced water stops cooking.
How to use the Egg Boiling Time Calculator
- Doneness
- Egg size
- Starting temperature
Results update as you type, and every field accepts the units shown in its menu.
How it works
Base times for a large egg added to boiling water are adjusted for size and temperature.
Inputs explained
| Field | What to enter |
|---|---|
| Doneness | Choose one: Soft, runny yolk, Jammy yolk, Medium, Hard-boiled |
| Egg size | Choose one: Medium, Large, Extra large, Jumbo |
| Starting temperature | Choose one: From the fridge, Room temperature |
Formula
Time ≈ base time × size factor + 1 min if from the fridgeWorked example
Inputs — Doneness: Soft, runny yolk; Egg size: Large; Starting temperature: From the fridge.
Results — Boil for = 7.5 minutes.
Frequently asked questions
Does altitude matter?
Yes, water boils at a lower temperature at altitude, so add time.
Why do fresh eggs peel badly?
Very fresh eggs stick to the shell; eggs a week or two old peel more easily.
What formula does the Egg Boiling Time Calculator use?
Time ≈ base time × size factor + 1 min if from the fridge.