How long is a year on Neptune?
Data as of July 2026
165 Earth yearsone orbit of the Sun
A year on Neptune, one full trip round the Sun, lasts 60,182 Earth days, or 164.77 Earth years. Counted in Neptune's own days (sunrise to sunrise), that is about 89,700 Neptune days.
▶ Watch Neptune orbit in 3D
What a Neptune year means
Neptune was discovered in 1846 and completed its first full orbit since then only in 2011. Nobody alive at its discovery saw it come back round.
One year
60,182 Earth days
In Earth years
164.77
In Neptune days
about 89,700
If you are 30 on Earth
you'd be 0.18 in Neptune years
Distance from the Sun
30.1 AU
A day there
16 h 7 min
Year length on every world
| World | One year | In its own days |
|---|---|---|
| Mercury | 88 Earth days | 0.5 |
| Venus | 225 Earth days | 1.9 |
| Earth | 365 Earth days | 365.25 |
| Mars | 687 Earth days | 669 |
| Jupiter | 11.9 Earth years | about 10,500 |
| Saturn | 29 Earth years | about 24,200 |
| Uranus | 84 Earth years | about 42,700 |
| Neptune | 165 Earth years | about 89,700 |
| Pluto | 248 Earth years | about 14,200 |
The farther out a world orbits, the longer its year, and not just because the path is longer: the Sun's pull is weaker out there, so the outer planets also move more slowly. In the interactive view, speed up time and watch the inner planets lap the outer ones.
Keep going
✓ 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 Found something out of date?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.