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Depending on how cooked you like your hard boiled eggs, the eggs should be done perfectly in 10-12 minutes. That said, depending on your altitude, the shape of the pan, the size of the eggs, the ratio of water to eggs, it can take a few minutes more.
If It doesn't take that long to make a hard-boiled egg. All you need is ten minutes, a stove, and a pot of water. But knowing how long hard-boiled eggs last? Well, that's a little more complicated. According to the eggy experts at the American Egg Board, you can keep a hard-boiled egg in its shell for up to a week in the refrigerator. A peeled hard-boiled egg, however, should be eaten the same day it's peeled for best quality.