How long do ducks sit on eggs before they hatch,?

My duck Jill is sitting on about 14 eggs, when will they hatch, and will they all hatch at the same times, how will l know when they will be hatched.
Answers:
Duck eggs need to be incubated for 28 days. That is 28 days from the time she starts sitting on them. It may take her a couple of weeks to lay enough eggs for her to start sitting. When she feels that her clutch (group of eggs) is the right size, she will start sitting. Wait for 28 days. Any eggs that are not hatched after 35 days are probably bad. Throw them away. If she moves an egg out of her clutch then it is bad. Do not try to put it back. bad does not necessarily mean rotten. It may just not be fertilized. There is a drake in the flock, right?

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18 MINUTES

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be patient it will happen

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usally they will hatch about 3 or 4 months after she lays them and no they will not all hatch most of them do though.

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well. first off are they fertile ?
2nd it takes 21 or more days
they should hatch one a day or it depends on when she started laying on them.
you will know by hearing peeps and stuff.
good luck
let me know if you have more questions.

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Eggs from common ducks like Pekins require 28 days to hatch. Eggs from Muscovy ducks hatch in about 35 days after setting. When larger numbers of duck eggs are to be hatched, large commercial incubators (setters) and hatchers are normally used. Pekin duck eggs are kept in a setter for 25 days and then transferred on the 25th day to a hatcher where they remain until they hatch on the 28th day.

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It takes 28 days for the eggs to hatch

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Duck eggs hatch in a period of 28-33 days after they are laid, if they are fertile. The ducklings will hatch over a period of several hours, maybe even over a day or so.

If there is no Jack in Jill's life, the eggs are not fertile and will never hatch. (Female ducks will sit on eggs even if they are not fertile, but if it goes much over a month with none hatching, you can assume that the eggs were not fertile and you should take them away so that Jill can move on to other things.)