How long is a day on Uranus?
Data as of July 2026
17 h 14 minone full spin
A day on Uranus lasts 17 h 14 min. That is 72% of an Earth day, and Uranus spins backwards compared with most of the planets. Uranus has no solid surface, so its day is the time the planet takes to turn once.
▶ Watch Uranus turn in 3D
Why Uranus's day is so short
Uranus is tipped over by 98°, so its 17-hour spin carries the equator round while the poles point almost at the Sun. Over its 84-year orbit that means each pole gets about 42 years of continuous daylight, then 42 years of night, whatever the length of the "day".
Sunrise to sunrise
17 h 14 min
One spin (against the stars)
17 h 14 min, backwards
Compared with Earth
72% of an Earth day
Uranus days in its year
about 42,700
Its year
84 Earth years
Distance from the Sun
19.2 AU
Day length on every world
| World | Day (sunrise to sunrise) | One spin |
|---|---|---|
| Jupiter | 9 h 56 min | 9 h 56 min |
| Saturn | 10 h 39 min | 10 h 39 min |
| Neptune | 16 h 7 min | 16 h 7 min |
| Uranus | 17 h 14 min | 17 h 14 min (backwards) |
| Earth | 24 h 0 min | 23 h 56 min |
| Mars | 24 h 40 min | 24 h 37 min |
| Pluto | 6.4 Earth days | 6.4 Earth days (backwards) |
| Venus | 117 Earth days | 243 Earth days (backwards) |
| Mercury | 176 Earth days | 58.6 Earth days |
Earth's spin, against the stars, takes 23 h 56 min; the extra four minutes to a 24-hour day come from Earth moving along its orbit while it turns. On Uranus the same effect is too small to matter.
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✓ Facts verified July 2026
Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.