How long does it take to charge a Kindle?

It will only take 4-6 hours.Though it depends on how ling you used it.But if its completely dead,6 hours.ope this helps! ;) - Just an interjection. I have a kindle Fire HD 7". When I frst got it I charged it for 24 hours like they said. I can plug mine in to the wall charger and if it's about 10% battery It takes about 30 minutes.