Advanced options
Times assume the reliable method: lower eggs into simmering water (not cold-start: cold-start times depend on your hob and pan, which is why granny's timing never works in your kitchen). Peeling truth: very fresh eggs peel terribly: week-old eggs peel cleanly: and an ice-bath stop makes both the peeling and the no-grey-ring difference for hard boiled.
What The Boiled Egg Timer Calculator Works Out
- Boil for: the base time for your yolk (5 minutes runny, 7 jammy, 9 fully set) plus a minute for a large egg, minus 30 seconds for a small one, plus 30 seconds if it comes straight from the fridge. The grid only works because the method is fixed: eggs lowered into already-simmering water, where the clock means the same thing on every hob.
- The method: gentle bubbles rather than a rolling boil, eggs in on a spoon, timer on immediately, out exactly at time. Cold-start timings fail because the heat-up phase varies with pan, water volume and hob power.
- Stop the cracking: cracking is thermal shock meeting the fat-end air pocket. A pin-prick, half a minute's rest out of the fridge or a gentler simmer fixes it; salt in the water merely seals leaks faster.
- Eggs in the pan (advanced): adds 15 seconds per egg beyond the second, because a crowded pan drops the water temperature when the eggs go in. Use a pan that holds them in a single layer.
- Method (advanced): steaming in a basket over boiling water adds about a minute and is gentler on shells; an air fryer at 130C with no water runs roughly 9, 11 and 14 minutes for soft, medium and hard, with the usual size adjustments, but test one egg first because machines vary.
- Personal adjustment (advanced): a fine-tune in quarter minutes for your pan, your altitude or your idea of jammy. Thirty seconds separates the three correct answers.
- Timer in seconds and start the toast (advanced): the total as a single number for a phone timer, and the moment to drop the toast so your soldiers land as the eggs come out.
- After the timer (advanced): soft eggs go straight to the cup; jammy eggs get a minute in cold water; hard eggs want 5 minutes in iced water, which stops the grey-green ring (iron and sulphur meeting at the yolk boundary) and makes them peel. Week-old eggs peel far better than new-laid ones.
- Meal-prep batch and cost (advanced): how many eggs to hard boil for a week of lunches (they keep 7 days in the fridge in their shells) and the cost of the eggs on the pan at your price per dozen. UK medium eggs are about GBP 2.50 to GBP 3.50 a dozen, roughly 25p each.