Sidereal Day to Hours
Convert a sidereal day to hours. It is how long Earth takes to turn once relative to the stars, about four minutes shorter than the 24 hours we keep by the Sun.
Common values
Formula
hours = sidereal day × 23.9344695944
Earth orbits while it spins, so it must turn a little further to bring the Sun back around. That extra 3 minutes 56 seconds a day adds up to exactly one day a year.
Frequently asked questions
Q. How many hours is 1 sidereal day?
1 sidereal day is 23.93447 hours, and 10 sidereal day is 239.3447 hours. Type any value in the box above to convert instantly.
Q. And how many sidereal day is 1 hours?
1 hours is 0.04178 sidereal day. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
Earth orbits while it spins, so it must turn a little further to bring the Sun back around. That extra 3 minutes 56 seconds a day adds up to exactly one day a year.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.