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.
http://www.simplyrecipes.com/recipes/how_to_make_perfect_hard_boiled_eggs/
If you need easy-to-peel eggs and you have fresh eggs, you might want to try steaming the eggs for 15 minutes. Pour an inch of water into a pot and insert a steamer basket.Bring to a boil. Place the eggs in the steamer basket, cover and steam for 15 minutes (more or less, check!).
http://www.simplyrecipes.com/recipes/how_to_make_perfect_hard_boiled_eggs/
For a hard-boiled egg, start the egg in cold water and bring up to the boil. Once the water is gently boiling, set the timer for between 7-10 minutes depending on how well cooked you like your eggs. The longer you boil the egg, the firmer it will be.
http://www.bbc.co.uk/food/techniques/how_to_boil_eggs
1 If you like your eggs medium-boiled, remove them from the water in 5-7 minutes. 2  The yolks should be semi-soft in the very center and the whites should be very firm. 3  If you like your eggs hard-boiled, leave the eggs in the hot water for up to 10-15 minutes.
http://www.wikihow.com/Hard-Boil-an-Egg
For hard-boiled eggs, put the eggs in a pan and cover them with cold water. This way you'll have less of a chance of breaking them. Bring to a boil, put a lid on it and turn off the heat. Let it stand for 10 to 15 minutes.
http://www.foodnetwork.com/how-to/photos/how-to-hard-boil-and-soft-cook-eggs.html
1 If you like your eggs medium-boiled, remove them from the water in 5-7 minutes. 2  The yolks should be semi-soft in the very center and the whites should be very firm. 3  If you like your eggs hard-boiled, leave the eggs in the hot water for up to 10-15 minutes. 4  The yolks should be firm all the way through.
http://www.wikihow.com/Hard-Boil-an-Egg
If you are planning to make hard boiled eggs for Easter and want to make sure that the eggs are easy to peel, buy your eggs at least a week ahead of time (two weeks even better, they'll keep). If you need easy-to-peel eggs and you have fresh eggs, you might want to try steaming the eggs for 15 minutes.
http://www.simplyrecipes.com/recipes/how_to_make_perfect_hard_boiled_eggs/
Hard-cooked eggs in the shell can be refrigerated up to one week. Peeled hard boiled eggs can be stored in the refrigerator in a bowl of cold water to cover for about 1 week (change the water daily) - or in a sealed container without water (cover the eggs with damp paper towels) for the same length of time.
http://whatscookingamerica.net/Eggs/BoiledEggs.htm
An egg that is at room temperature at the start of the cooking process will require about 1 minute less cooking time than eggs taken directly from the refrigerator. 4. Technique for hard-cooking (boiled) eggs: Choose the right size pot to cook your eggs in: The eggs must not be stacked but be in one (1) layer only.
http://whatscookingamerica.net/Eggs/BoiledEggs.htm
Skip this step if your eggs are very soft-boiled with runny yolks or if you're planning to dye your eggs for Easter. Place the eggs in a bowl of ice water. Fill a bowl with ice water. Transfer the eggs to the bowl and leave them there for at least 1 minute.
http://www.thekitchn.com/how-to-boil-eggs-perfectly-every-time-cooking-lessons-from-the-kitchn-202415
how long do you boil a egg
You can boil an egg for 10 to 12 minutes. You boil a rgg for 10-12 minutes.