You can tell when eggs are done boiling by using a combination of timing, physical tests, and visual cues:

Timing Guidelines for Boiled Eggs

• For soft-boiled eggs with runny yolks, boil for about 6 to 7 minutes.
• For hard-boiled eggs with fully cooked yolks, boil for 12 to 14 minutes.
• Some sources suggest 10 minutes for classic hard-boiled eggs, but 12-14 minutes ensures fully set yolks

Physical Tests to Check Doneness

• Spin Test: Place the egg on a flat surface and spin it. A hard-boiled egg spins quickly and smoothly, while a raw egg wobbles and spins slowly due to the liquid inside. When you stop the spinning egg with your finger, a hard-boiled egg stops immediately, but a raw egg will continue to wobble

• Float Test: Contrary to some beliefs, hard-boiled eggs do not float in water. This test is not reliable for doneness

Visual and Temperature Indicators

• You can shine a flashlight through the egg to see differences in opacity; cooked eggs appear more solid inside

• The internal temperature of a hard-boiled egg should reach at least 160°F (71°C) to be fully cooked and safe to eat

• After boiling, immediately cool eggs in ice water to stop cooking and make peeling easier

Summary of How to Know Eggs Are Done Boiling

• Use a timer set according to desired doneness (6-7 min for soft, 12-14 min for hard).
• Perform the spin test: a hard-boiled egg spins easily and stops quickly when tapped.
• Optionally, check internal temperature (≥160°F) for food safety.
• Cool eggs quickly in cold water after boiling.

These methods combined give a reliable way to know when your eggs are done boiling without cracking them open prematurely.