In FNaF 4, one in-game hour is about one real minute. So a full night from 12 AM to 6 AM is roughly 6 minutes long.

Quick Scoop

That means the game’s clock moves much faster than real life, with each hour passing in about 60 seconds. Some fan discussions and timing checks also line up with that same estimate.

Extra context

  • One hour in FNaF 4: about 1 minute.
  • One full night: about 6 minutes.
  • The exact feel can vary a little by mode or source, but the common answer is still 1 minute per hour.

TL;DR: FNaF 4’s minute-long hour is basically the standard answer.