Egg Boiling Time Calculator

Boiling an egg is less about one magic number and more about matching the time to the yolk you want, then nudging it for a few variables. From a gentle boil, a large egg straight from the fridge runs about 6 to 7 minutes for a soft, runny yolk, around 8 minutes for a jammy medium yolk that is set but still fudgy in the middle, and 10 to 12 minutes for a fully firm hard-boiled yolk. Go much past 12 and you get the chalky texture and grey-green ring that means the egg is overdone.

Three things shift those numbers. Bigger eggs need more time, so a jumbo can run a minute or two longer than a medium. Starting temperature matters too: an egg that has come up to room temperature cooks a touch faster than one pulled cold from the fridge, and it is also less likely to crack from the thermal shock. Altitude pushes times up, because water boils cooler the higher you are, so above a few thousand feet you add roughly a minute.

The method matters as much as the clock. Lower the eggs gently into water that is already boiling, drop it back to a steady gentle boil, and start your timer right away. The moment the time is up, move them into an ice bath for five minutes. That stops the cooking so the yolk does not keep firming, and the quick contraction makes the shells far easier to peel. One quirk worth knowing: eggs a week or two past purchase peel more cleanly than truly fresh ones, so the carton at the back of the fridge is the one to reach for.