How Long to Boil Eggs: Soft, Medium & Hard (Minute Chart)

By Suraj Giri at The Blog Timer. Updated 2026-05-27.

How Long Should You Boil an Egg?

For large eggs starting in boiling water, the standard times are 4 minutes for a soft, runny yolk; 6:30 for a jammy soft-boiled; 9 minutes for a medium-set yolk; and 10-11 minutes for a fully hard-boiled egg. For cold-start methods (eggs placed in cold water and brought to a boil), subtract about 1 minute from each target. Always finish with an ice bath of 2-3 minutes for shells that peel cleanly.

What Happens to an Egg as It Cooks?

The science is well-characterized. Egg whites contain ovalbumin and other proteins that begin to denature at roughly 62°C (144°F) and set firmly by about 80°C (176°F). Egg yolks contain different proteins that set at slightly higher temperatures, starting to thicken around 65°C (149°F) and firming completely by about 70-75°C (158-167°F). This is why the white sets before the yolk and why an egg held at 63-65°C produces the famous onsen-style soft yolk with barely-set whites. The general phenomenon is protein denaturation.

Boiling water sits at 100°C (212°F) at sea level, well above every denaturation threshold. The art of boiled-egg timing is therefore the art of controlling heat penetration from the shell inward to the center of the yolk. The longer the egg cooks, the further the denaturation front travels.

Egg Doneness Times: A Reference Table

Cold-Start vs. Boiling-Water Start: Which Is Better?

Boiling-water start (lower egg gently into already-boiling water) gives more consistent timing because every egg starts at the same moment. The shock of hot water also makes shells peel more cleanly — the rapid temperature change separates the membrane from the white. This is our default method.

Cold-water start (egg in cold water, brought to a boil together) is gentler — less risk of cracking — but the timing is harder to standardize because stove power, pot size, and water volume all affect the time to boil. Use it when cooking large batches or when shells are fragile.

How Does Altitude Change Boiling Times?

Boiling temperature drops about 1°C per 300 meters (or 1°F per 500 feet) of elevation. At 1,500 m (Denver), water boils at roughly 95°C; at 3,000 m it drops to about 91°C. Since the temperature gradient driving heat into the egg is smaller at altitude, cooking times must be extended. A practical rule: add 30-60 seconds for every 1,000 m above sea level. In Denver, add about a minute. In La Paz (3,650 m), add 2-3 minutes.

Egg Size Matters

The USDA shell-egg guidelines standardize these sizes, but real-world supermarket eggs vary. For consistency, use eggs from the same carton.

Does Salt or Vinegar Change Cooking?

A teaspoon of salt or a tablespoon of vinegar added to the water makes negligible difference to cooking time. Their actual function is rescue work: if the shell cracks during boiling, salt or vinegar in the water causes the leaking white to set quickly and seal the crack rather than streaming out. Vinegar slightly lowers the pH; salt raises the boiling point by a fraction of a degree. Neither is required for normal cooking.

Why an Ice Bath Matters

An ice bath of 2-3 minutes after cooking serves two purposes. First, it halts cooking immediately — without it, residual heat continues to cook the yolk for another 30-60 seconds, throwing off a delicate 6:30 jammy egg. Second, the rapid cooling contracts the egg slightly inside the shell, which combined with the slight steam pressure under the membrane causes the shell to release from the white. An egg dropped straight from boiling water into ice water peels far more cleanly than one allowed to cool slowly.

Submerge fully and wait at least 2 minutes for soft-boiled and 3-5 minutes for hard-boiled.

The “Perfect” 6:30 Jammy Egg, Explained

At 6:30 from boiling-water start, a large egg has whites fully set (the denaturation front has traversed the white completely) and a yolk in which only the outer 2-3 mm have set, leaving the center custardy. The texture is the classic ajitsuke tamago ramen egg or the soft-boiled egg of a French oeuf mollet. It is the highest-information egg — every millimeter of yolk has a slightly different texture.

To hit it reliably: use refrigerator-cold eggs (consistent starting temperature), lower into rolling boiling water, set a timer immediately, and transfer to ice bath the instant the timer rings. A second of delay matters.

Food Safety: Are Soft-Boiled Eggs Safe?

The U.S. FDA and the CDC recommend cooking eggs until both white and yolk are firm to inactivate Salmonella. For a fully hard-boiled egg, the center reaches well above the 71°C (160°F) safety threshold. Soft-boiled and jammy eggs do not reach that internal temperature throughout — the center is below the inactivation threshold. The empirical risk from commercial pasteurized-shell eggs or fresh eggs from a known source is low, but it is not zero. Pregnant people, young children, and immunocompromised individuals should cook eggs fully.

How Long Can You Store Hard-Boiled Eggs?

The FDA recommends storing peeled or unpeeled hard-boiled eggs in the refrigerator for up to 1 week. Unpeeled eggs last longer (the shell protects against contamination); peeled eggs should be kept submerged in water in a sealed container and used within 4-5 days for best texture.

Shell-Peeling Tips That Actually Work

• Use eggs that are 7-10 days old; very fresh eggs (less than 3-4 days from laying) peel poorly because the membrane adheres tightly to the white.
• Use a boiling-water start, not a cold-water start.
• Plunge directly into ice water immediately after cooking.
• Crack the wide end first (where the air pocket sits) and roll the egg gently to crack the entire shell before peeling under cold running water.
• For batches, shake several cracked eggs together in a covered container with a little water — the friction loosens the shells.

How Does Sous Vide Compare?

A sous vide egg holds the water at a precise temperature (typically 63-75°C) for 45-60 minutes, equilibrating the entire egg to that exact temperature. The result is unmatched texture control: at 63°C the yolk is creamy, at 68°C it is more set, at 75°C it approaches conventional hard-boiled. Sous vide trades speed (40-60 min vs. 10 min) for precision. For perfect consistency across many eggs, it is superior; for a quick breakfast, conventional boiling wins.

Why Do Some Eggs Get a Green Ring Around the Yolk?

The grey-green ring around an overcooked yolk is iron sulfide, formed when hydrogen sulfide from the white reacts with iron in the yolk. The reaction happens above roughly 100°C sustained for several minutes — in practice, when eggs are boiled for 15+ minutes or held in hot water after cooking. It is harmless and tasteless but visually unappealing. The fix: stop cooking on time, and ice-bath promptly. The chemistry is described in standard food-science references on egg cookery.

Should You Prick the Egg?

Some cooks prick the wide end of the egg with a pin before boiling to release pressure from the air pocket as the egg heats. The technique has two effects: it slightly reduces cracking and it can produce a more rounded yolk (since the egg loses a tiny amount of mass through the prick). It is not strictly necessary; a boiling-water start with eggs lowered gently using a spoon usually achieves the same anti-cracking effect.

How Does Egg Freshness Affect Cooking?

A very fresh egg (1-3 days from laying) has a pH of about 7.6 and a tight membrane that adheres closely to the white. As the egg ages, the pH rises (toward 9.2 over weeks), the membrane loosens, and the air pocket expands. The aging produces an egg that peels more cleanly but does not significantly change cooking time. For hard-boiled eggs intended for peeling, use eggs that are at least a week old. For very soft preparations where peel quality matters less, very fresh eggs are fine.

Pressure Cookers and Instant Pots

Pressure-cooked eggs follow a different timing convention because the cooker reaches higher temperatures (typically 115-120°C) under pressure. The popular “5-5-5” method (5 minutes high pressure, 5 minutes natural release, 5 minutes ice bath) produces hard-boiled eggs that peel exceptionally cleanly — the rapid pressure change separates membrane from white more effectively than boiling. Soft-boiled equivalents (3-3-5 or 4-4-5) are achievable but less reliable; the higher temperature shrinks the margin between perfect and overcooked. For consistent soft-boiled eggs, traditional boiling-water timing is more forgiving.

Storage and Reheating

Hard-boiled eggs reheat poorly. Microwaving an intact peeled egg can cause it to explode (steam pressure has no escape); sliced eggs reheat to rubber. Best practice: eat hard-boiled eggs cold, or warm them briefly in hot (not boiling) water for 30-60 seconds. For meal prep, peel and store submerged in cold water in a sealed container, replacing the water every 1-2 days; use within 4-5 days.

Quail, Duck, and Other Eggs

Smaller eggs cook faster simply because the heat penetration distance is shorter; goose and ostrich eggs need substantially longer.

What About Older Methods: The 17-Minute Egg?

Older American cookbooks frequently recommend 12-17 minutes for hard-boiled eggs, which by modern standards is overcooked. The longer times originate from an era of less reliable temperature control on home stoves and a stronger food-safety bias. With modern stoves and standardized eggs, 10-11 minutes produces a fully cooked egg with a tender, bright yolk and minimal sulfur development. The 17-minute hard-boiled egg is largely a relic.

Why the Same Time Sometimes Gives Different Results

Even with identical timing, eggs from the same carton can vary slightly in doneness. The variables are: starting temperature of the egg (refrigerator-cold vs. room-temperature can shift outcome by 30-60 seconds), egg size and shell thickness, water-to-egg ratio (more eggs in a pot drop the water temperature briefly when added), and stove power. For competition-level consistency, start with refrigerator-cold eggs of uniform size, use a large volume of vigorously boiling water, and add eggs one at a time using a slotted spoon to minimize splashing and temperature drop.

Frequently Asked Questions

How long should I boil eggs for hard-boiled?

10-11 minutes from boiling-water start for a large egg, followed by a 3-5 minute ice bath. Add 30-60 seconds at high altitude.

How long for runny yolks?

4 minutes from boiling-water start. Transfer immediately to ice water to halt cooking.

Why are my hard-boiled eggs hard to peel?

Most often because the eggs are too fresh. Eggs that are 7-10 days old peel best. A boiling-water start and immediate ice bath also help.

How do you know when boiled eggs are done?

Timing is the only reliable test. Visually testing without breaking the shell is unreliable. Use a kitchen timer or our egg timer.

Should you start eggs in cold or hot water?

Either works, but boiling-water start gives more reproducible timing. Cold-water start is gentler on shells.

How long do hard-boiled eggs last in the fridge?

Up to 1 week, per FDA guidance. Keep unpeeled in the shell for best storage.

What is the perfect time for a jammy egg?

6 minutes 30 seconds from boiling-water start for a large egg, then 2 minutes in an ice bath.