Space & Stars
61 free space & stars calculators — including Exoplanet Habitability Calculator and Moon Phase Calculator. Instant results in your browser, with the formula shown.
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Age on Other Planets Calculator
Calculate your age in years on each planet in the solar system.
Moon Phase Calculator
Calculate the moon phase for any given date.
Weight on Other Planets
Calculate your weight on other planets.
Sunrise Sunset Calculator
Estimate sunrise and sunset times.
Exoplanet Habitability Calculator
Calculate habitability index for exoplanets.
Your Weight on Other Planets Calculator
Find out how much you would weigh on other planets and moons.
Light Travel Time Calculator
Calculate how long light takes to travel from a star or planet.
Orbital Period Calculator
Calculate orbital period of a moon or satellite.
Black Hole Time Dilation Calculator
Calculate time dilation effect near a black hole.
Escape Velocity Calculator
Calculate escape velocity from a celestial body.
Sunrise and Sunset Time Calculator
Calculate approximate sunrise and sunset times for your location.
Light Distance Calculator
Convert light years to kilometers.
Next Lunar Eclipse Estimator
Estimate next lunar eclipse date.
Gravity Calculator
Calculate gravitational force between two bodies.
Cosmic Redshift Calculator
Calculate cosmic redshift and distance.
Asteroid Impact Calculator
Calculate asteroid impact energy and effects.
Spacecraft Delta-V Calculator
Calculate required delta-v for space missions.
Planetary Escape Velocity
Calculate escape velocity from a planet.
Rocket Delta-V Budget Calculator
Calculate delta-V budget for space mission.
Satellite Orbit Calculator
Calculate satellite orbit properties.
Light Year Converter
Convert distances between light years, kilometers, and miles.
Light Distance Calculator - Light Years
Calculate the distance light travels in a given time period.
Star Luminosity Calculator
Calculate star luminosity from radius and temperature.
Solar Eclipse Calculator
Calculate approximate next solar eclipse timing.
Hubble Distance Calculator
Calculate galaxy distance using Hubble Law.
Interplanetary Travel Time Calculator
Calculate approximate travel time between planets.
Meteor Shower Calculator
Calculate best time to view major meteor showers.
Star Distance (Parallax)
Calculate star distance from parallax.
Rocket Delta-V Calculator
Calculate rocket delta-v.
Solar Energy Output Calculator
Calculate solar panel output by location.
Stellar Parallax Calculator
Calculate stellar distance using parallax.
Solar Irradiance Calculator
Calculate solar irradiance at a given distance.
Binary Star Orbit Calculator
Calculate binary star system properties.
Supernova Remnant Calculator
Calculate supernova remnant properties.
Tidal Force Calculator
Calculate tidal force between celestial bodies.
Satellite Orbital Decay Calculator
Calculate satellite orbital decay rate.
Stellar Magnitude Calculator
Calculate apparent and absolute stellar magnitude.
Schwarzschild Radius Calculator
Calculate Schwarzschild radius of a black hole.
Telescope Resolution Calculator
Calculate telescope angular resolution.
Eclipse Duration Calculator
Calculate eclipse duration.
Stellar Lifespan Calculator
Calculate expected stellar lifespan based on mass.
Moon Phase Angle Calculator
Calculate moon phase angle and illumination.
Weight on Planets Calculator
Calculate your weight on different planets in the solar system.
Comet Position Calculator
Calculate approximate comet distance from the Sun.
Apparent Magnitude Calculator
Calculate apparent magnitude of a celestial object.
Stellar Evolution Calculator
Calculate expected lifespan of a star based on its mass.
Cosmic Distance Ladder
Convert between cosmic distance units.
Sunset Direction Calculator
Calculate sunrise/sunset azimuth angle.
About Space & Stars
61 free Space & Stars tools are listed on this page, led by Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator in popularity order. Each computes its result directly in your browser and shows the formula it applies. The grid also covers Weight on Other Planets, so most common Space & Stars questions have a matching tool. No accounts, no fees — every answer ships with the arithmetic behind it.
What you can calculate
Exoplanet Habitability Calculator, Moon Phase Calculator, Age on Other Planets Calculator, Weight on Other Planets
Top Space & Stars Calculators
Age on Other Planets Calculator
Calculate your age in years on each planet in the solar system.
Moon Phase Calculator
Calculate the moon phase for any given date.
Weight on Other Planets
Calculate your weight on other planets.
Sunrise Sunset Calculator
Estimate sunrise and sunset times.
Exoplanet Habitability Calculator
Calculate habitability index for exoplanets.
FAQs about Space & Stars
What is the best calculator in the Space & Stars category?
The most popular Space & Stars tools on this site are Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator, in that order. All are free, run instantly in your browser, and show their calculation steps — pick the closest to your case or try more than one.
Are the Space & Stars calculators free to use?
Yes — all 61 tools in the Space & Stars category are completely free: they run in your browser with no sign-up and never send your inputs anywhere. Enter your values and the result appears instantly, with the formula used shown.
How many calculators are in the Space & Stars category?
The Space & Stars category currently lists 61 free tools. The most used are Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator, and all of them are reachable directly from the grid on this page, with no registration required.