How long does it take to boil hard eggs?

Hard boiling time for eggs depends on their initial temperature, altitude and the desired yolk consistency. As a general guideline, here are some approximate times for hard-boiling eggs:

Starting with eggs at room temperature (around 20-25°C or 68-77°F) at sea level (0 meters or 0 feet above sea level):

For slightly set yolks: bring the water to a boil, then immediately remove from heat and cover with a lid. Let the eggs sit in the hot water for 6-7 minutes.

For medium-set yolks: bring the water to a boil, then lower the heat to medium and simmer for 7-10 minutes.

For fully set yolks: bring the water to a rolling boil, then lower the heat to medium and simmer for 11-13 minutes.

Please note that these times are just approximate and may vary depending on your individual stove, altitude, and personal preference for yolk consistency. It's a good idea to test a single egg first to ensure you get the desired result before boiling a larger batch.

Adjustments for Altitude:

At higher altitudes, water boils at a lower temperature, so you may need to increase the boiling time by a few minutes. A rule of thumb is to add one minute for every 500 feet (150 meters) above sea level. For example, if you're at an altitude of 3000 feet (900 meters), add 6 minutes to the recommended boiling time.

Cold Eggs vs. Room Temperature Eggs:

Starting with cold eggs (straight from the refrigerator) will result in a longer boiling time compared to room temperature eggs. Add an extra 1-2 minutes to the recommended boiling times if using cold eggs.