How long does it usually take to hatch completely out?

[kare21162]

10 of my chicken eggs are on day 20 today and I have 3 that have pips that I can see. It's been about 4 hours since I saw the first egg pip...how long does this usually take to completely hatch out? A day?

 

[Eric in NC]

I just had my first hatch so no expert but mine ranged from 20 minutes from pip to out to more than 30 hours (one of the first ones to pip was the last one out).