Planet Tools
Hands-on tools for planet builders. Everything runs in your browser — no sign-up needed.
Design Your Planet
Pick an orbit, a climate and how much land you want, then sculpt your own planet tile by tile in 3D.
Open tool →Your Weight and Age on Other Planets
How much would you weigh on Mars? How old would you be on Jupiter? Enter your numbers and find out.
Open tool →Planet Size Comparison
See the Sun, the planets and the Moon side by side at true relative scale.
Open tool →Habitable Zone Calculator
Choose a star and find the range of distances where a planet could keep liquid water on its surface.
Open tool →