Planet Distance Calculator
Click two planets to see the distance between them. Distances are average orbital distances from the Sun.
Try it with this example
Click Earth and Mars to see the distance in km, miles, and AU. Try Jupiter to Saturn for a larger gap.
What is this tool?
The Planet Distance tool shows the average distance between any two planets in our solar system. Click Earth and Mars, and you see the gap in kilometers, miles, and astronomical units (AU). Click Jupiter and Saturn for a larger distance. It uses the mean orbital radii from the Sun, so you get the typical separation—not the minimum or maximum, which vary as planets orbit at different speeds. For education, curiosity, or rough scale comparisons, it's ideal.
Distances are given in km, miles, and AU. One AU is the Earth–Sun distance, about 150 million km. Expressing distances in AU makes the scale easier to grasp: Mars is about 1.5 AU from the Sun, Jupiter about 5.2 AU. The tool computes the distance between two planets as the difference (or sum, depending on configuration) of their orbital radii—a simplification that ignores their actual positions. For average, order-of-magnitude distances, that's sufficient.
Use it in classrooms to visualize the solar system, in science writing to cite distances accurately, or for fun to answer "how far is Neptune from Earth?" The tool runs entirely in your browser. No API, no server. Just pick two planets and read the result.
It doesn't account for launch windows or Hohmann transfers—that would require dynamic positions. For a quick reference of average distances, this tool delivers. Dwarf planets and moons are not included; the focus is on the eight major planets.
Perfect for education, outreach, and satisfying space-curiosity.