How Long to Boil an Egg: Soft to Hard-Boiled

·Published: 8 August 2026

For a large egg lowered into already boiling water, allow 5 to 6 minutes for a runny yolk, 7 to 8 minutes for a jammy or medium-set yolk, and 10 to 12 minutes for a fully firm yolk. The shorter end of each range suits an egg that has warmed slightly; a cold egg straight from the fridge may need the longer end. Set a kitchen timer as soon as the egg enters the water, then cool it promptly when the chosen time is up.

Boiling times and the result inside

These timings assume a large hen’s egg, a saucepan of water at a steady boil and enough water to cover the shell. Lower the egg gently with a spoon so that it does not strike the base of the pan. Keep the water bubbling without letting it churn so violently that the egg is knocked around. The useful starting points are:

• 5 minutes: set white with a very liquid yolk, suited to dipping toast soldiers.
• 6 minutes: firm white and a runny yolk that has begun to thicken near its edge.
• 7 minutes: mostly set, creamy yolk with a softer centre.
• 8 minutes: medium-set or jammy yolk, moist throughout but no longer runny.
• 10 minutes: firm yolk that retains a little softness at its centre.
• 12 minutes: fully hard-boiled yolk, useful when the egg needs to be sliced cleanly.

A classic British soft-boiled egg with soldiers generally falls in the 5-to-6-minute range. Serve it upright in an egg cup, tap off the top and dip in narrow strips of buttered toast. If the white nearest the shell still seems too loose for you, add about 30 seconds next time rather than jumping immediately to a much longer boil. Small adjustments make a noticeable difference around the soft-boiled stage.

Why timing starts when the egg meets boiling water

Starting with boiling water gives the timer a clear and repeatable reference point. If you begin counting when the hob is switched on, the result depends on the volume of water, the saucepan, the hob, the starting water temperature and even whether a lid is fitted. One kitchen might reach boiling point in four minutes while another takes considerably longer, so identical timer settings could produce different yolks.

Wait until the water is boiling, reduce any fierce rolling movement, then lower in the egg and start the countdown immediately. Adding a cold egg may briefly calm the bubbling; there is no need to wait for a second vigorous boil before counting. Keep the pan over the heat so the water returns to a gentle boil. Using the same pan, water level and hob setting on later attempts will make your preferred timing easier to repeat.

Why egg size and fridge temperature matter

A larger egg contains more white and yolk for heat to travel through, so it usually takes longer than a medium or small egg to reach the same centre texture. An extra-large egg may need roughly another minute, while a smaller one may be ready a little sooner. Shell colour does not determine cooking time. Size and starting temperature have a much greater effect than whether the shell is white or brown.

An egg taken straight from the fridge begins several degrees colder than one left out briefly, so its centre warms more slowly. For fridge-cold eggs, use the upper end of the suggested range and expect to refine the timing by 30 seconds on a later attempt. A very cold shell is also more likely to crack when it meets boiling water. Lowering it gently helps, as does avoiding a violent boil, but an occasional crack does not necessarily mean the contents are unusable.

Cooling the egg and avoiding a grey-green ring

Once the timer sounds, move the egg into a bowl of iced water or very cold tap water. This stops the retained heat in the shell and white from continuing to cook the yolk, which matters when you want a precise runny or jammy centre. Cooling also makes a hard-boiled egg more comfortable to handle and can help the shell separate from the white, although very fresh eggs may still resist neat peeling.

The grey-green ring sometimes seen around a hard-boiled yolk forms when prolonged heat encourages sulphur from the white and iron from the yolk to react at their boundary. It looks uninviting but is generally harmless. Avoid it by not leaving the egg boiling far beyond the firm-yolk stage and by cooling it promptly afterwards. For an egg that will be eaten hot with soldiers, a brief cool rinse is enough to halt some carry-over cooking without making the centre cold; for peeling later, leave it in the cold bath until thoroughly chilled.