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Egg Boil Time Calculator — Perfect Eggs Every Time

Get perfectly boiled eggs with precise timing for your altitude, egg size, and preferred doneness

Cooking Time

8 min 30 sec

Method

Boiling Water

Boiling Point

212.0°F

Medium (jammy yolk)

Cooking Time

8 min 30 sec
Medium (jammy yolk) – Boiling Water
Egg Size
Large (57g)
Boiling Point
212.0°F
100.0°C

Doneness Comparison

Soft (runny)6.0 min
Medium (jammy)8.5 min
Hard (fully set)11.0 min

Step-by-Step Instructions

1Fill a pot with enough water to cover the eggs by 1 inch.
2Bring the water to a full rolling boil over high heat.
3Gently lower cold eggs into the boiling water with a slotted spoon.
4Boil for 8 min 30 sec.
5Transfer eggs immediately to an ice bath for 5 minutes to stop cooking.

Doneness Reference

DonenessYolkWhiteBest For
SoftRunny, liquidJust setRamen, toast
MediumJammy, custardFirmSalads, bowls
HardFully set, dryFirmSandwiches, deviled

Pro Tips

Ice bath: Always transfer eggs to ice water for 5 minutes to stop carryover cooking and prevent green yolks.
Easier peeling: Use eggs that are 7–10 days old. Fresh eggs cling to the shell and are harder to peel.
Baking soda trick: Add 1/2 tsp baking soda to the water to raise pH, making even fresh eggs easier to peel.
Altitude note: Above 5,000 ft, water boils at lower temperatures. Eggs need more time because the water is less hot.

Example Calculations

1Classic Medium (Jammy) Egg

Inputs

Egg SizeLarge (57g)
Starting TemperatureFrom Fridge (4°C)
DonenessMedium (jammy yolk)
Altitude0 ft (sea level)
MethodBoiling Water

Result

Cooking Time8 min 30 sec
Boiling Point212.0°F

A large egg straight from the fridge takes 8 minutes 30 seconds in boiling water at sea level for a perfect jammy yolk.

2Quick Soft-Boiled (Steamed)

Inputs

Egg SizeSmall (47g)
Starting TemperatureRoom Temp (20°C)
DonenessSoft (runny yolk)
Altitude0 ft (sea level)
MethodSteaming

Result

Cooking Time3 min 30 sec
Boiling Point212.0°F

A small room-temp egg steamed for 3 minutes 30 seconds produces a very soft runny yolk, perfect for dipping soldiers.

3Hard-Boiled at Denver Altitude

Inputs

Egg SizeExtra-Large (63g)
Starting TemperatureFrom Fridge (4°C)
DonenessHard (fully set)
Altitude5,280 ft (Denver)
MethodBoiling Water

Result

Cooking Time13 min 16 sec
Boiling Point202.3°F

At Denver altitude, water boils at 202.3°F instead of 212°F, adding nearly 2 extra minutes to the cook time for a fully set hard-boiled egg.

Frequently Asked Questions

Q

How long does it take to hard boil an egg?

A large egg from the fridge takes about 11 minutes in boiling water at sea level for a fully set yolk. Smaller eggs need less time while jumbo eggs need more. Altitude, starting temperature, and method all shift the timing by 30 seconds to 3 minutes.

  • Small egg (47g): about 10 minutes for hard boiled at sea level
  • Large egg (57g): about 11 minutes for hard boiled at sea level
  • Jumbo egg (70g): about 12 minutes for hard boiled at sea level
  • Room temperature eggs: subtract about 1 minute from all times
  • At 5,000+ ft altitude: add roughly 1–2 minutes due to lower boiling point
Egg SizeSoft (Runny)Medium (Jammy)Hard (Set)
Small (47g)5 min7 min 30 sec10 min
Large (57g)6 min8 min 30 sec11 min
Jumbo (70g)7 min9 min 30 sec12 min
Q

What is a jammy egg and how do I make one?

A jammy egg is a medium-boiled egg with a custard-like yolk that is set around the edges but soft and slightly gooey in the center. For a large egg from the fridge, boil for 8 minutes 30 seconds, then immediately transfer to an ice bath for 5 minutes.

  • Jammy yolks are set but creamy — not runny like soft-boiled, not dry like hard-boiled
  • Ideal internal temperature: around 158–167°F (70–75°C)
  • Large fridge egg in boiling water: 8 min 30 sec at sea level
  • Room temperature large egg: about 7 min 30 sec at sea level
  • Ice bath is critical — residual heat continues cooking the yolk without it
Q

Does altitude affect egg boiling time?

Yes, altitude significantly affects boiling time. Water boils at lower temperatures as altitude increases: 212°F at sea level but only 202°F in Denver (5,280 ft). The lower temperature means eggs cook more slowly and need extra time.

  • Sea level: water boils at 212°F (100°C) — standard cooking times apply
  • Denver (5,280 ft): water boils at ~202°F (94.5°C) — add ~1 min 45 sec
  • Mexico City (7,382 ft): water boils at ~198°F (92.5°C) — add ~2 min 30 sec
  • Rule of thumb: add about 2 seconds per 100 feet of elevation
  • Steaming is more consistent at altitude because steam temperature varies less
LocationAltitudeBoiling PointHard Boil Time (Large)
Sea Level0 ft212°F11 min
Denver, CO5,280 ft202.3°F12 min 46 sec
Mexico City7,382 ft198.4°F13 min 28 sec
Q

Is it better to start eggs in cold water or boiling water?

Boiling water is better for consistent results because you have a precise starting point. Cold-start methods are easier but less predictable since stove power varies. Steaming is the most consistent method because steam temperature stays constant.

  • Boiling water start: most precise timing, easiest to peel, recommended for beginners
  • Cold-start method: place eggs in cold water, bring to boil, then time — adds ~3 minutes total
  • Steaming: most consistent heat delivery, works well at any altitude, saves ~30 seconds
  • Cold-start yields more tender whites but timing is harder to control
  • Steaming uses less water and heats the pot faster than full-immersion boiling
Q

Why are my hard-boiled eggs hard to peel?

Fresh eggs are hardest to peel because the inner membrane sticks tightly to the shell. Eggs aged 7–10 days peel much more easily. Adding baking soda to the water raises pH, loosening the membrane even on fresh eggs.

  • Use eggs aged 7–10 days for easiest peeling
  • Add 1/2 tsp baking soda to the water to raise pH and loosen membranes
  • Start in boiling water (not cold) for better peel results
  • Ice bath for 5 full minutes helps the egg contract away from the shell
  • Peel under running water to help separate shell from white

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Last Updated: Mar 9, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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