* Mercury: 88 Earth days
* Venus: 225 Earth days
* Earth: 365.25 Earth days (that's why we have leap years!)
* Mars: 687 Earth days
* Jupiter: 11.86 Earth years
* Saturn: 29.46 Earth years
* Uranus: 84 Earth years
* Neptune: 165 Earth years
As you can see, the farther a planet is from the Sun, the longer its orbital period. This is due to Kepler's Third Law of Planetary Motion, which states that the square of a planet's orbital period is proportional to the cube of its average distance from the Sun.
