đ Gravity Simulator
Compare Gravitational Forces Across Planets and Celestial Bodies
Experience Gravity Across the Universe
Gravity shapes everything in our universeâfrom how we walk to how planets orbit stars. But gravitational force varies dramatically across celestial bodies. On Jupiter, you’d weigh 2.5 times your Earth weight. On the Moon, you’d bounce with just 16% of your normal weight. Our Gravity Simulator lets you experience these differences by calculating your weight, jump height, and escape velocity on any planet, moon, or exotic object like neutron stars and white dwarfs. Understanding gravity helps explain why astronauts float in space, why Saturn has rings while Earth doesn’t, and why we can’t simply fly to space by jumping really hard.
This calculator from SpaceTimeMesh uses Newton’s law of universal gravitation (F = GMm/r²) to compute surface gravity for any object with known mass and radius. Input your weight, and see it transform across different worlds. Discover that on the Sun’s surface (if you could stand there), you’d weigh 28 times your Earth weightâcrushing for humans but trivial compared to a neutron star where a sugar-cube-sized piece of matter weighs as much as all humanity. The tool also calculates escape velocityâthe speed needed to break free from gravitational pull. Earth’s 11.2 km/s is achievable with rockets, but a black hole’s infinite escape velocity makes them cosmic traps.
Perfect for physics students studying gravitational physics, science fiction writers creating realistic alien worlds, educators demonstrating planetary differences, or anyone curious about how their body would feel on Mars. Explore why Jupiter’s gravity prevented it from becoming a star, why the Moon has no atmosphere (low escape velocity), and how gravity creates the cosmic architecture we observe.
Calculate Gravity Across Worlds
Gravity Simulator
Discover your weight across the universe - from moons to neutron stars
Enter Your Weight on Earth
Filter by Type
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Weight Comparison Chart
Visual comparison of your weight across different bodies
Understanding Gravity
Mass vs Weight
Mass is the amount of matter in your body (stays constant). Weight is the force of gravity on your mass (changes by location).
Surface Gravity
Gravity depends on both mass and radius. Small but dense objects (like neutron stars) have crushing gravity.
Escape Velocity
The speed needed to escape gravity. Earth: 11.2 km/s. Moon: 2.4 km/s. Sun: 617.5 km/s!
Gravity Formula
g = GM/r². Gravity equals (gravitational constant à mass) divided by radius squared.
Jump Height
Lower gravity = higher jumps! On the Moon you can jump 6x higher. On Ceres, 36x higher!
Muscle Adaptation
Astronauts lose muscle in low gravity. High gravity would make you stronger... if it didn't crush you first.
Gravity Facts That Will Blow Your Mind
â ď¸ Extreme Gravity Scenarios
Gravity: 28Ă Earth
What happens: Crushed + Vaporized at 5778K
Time to death: < 0.001 seconds
Gravity: 2.5Ă Earth
What happens: Bones would crack, breathing difficult
Time to death: Minutes from crushing
Gravity: 0.38Ă Earth
What happens: Feel light, jump high, easy movement
Survival: With spacesuit - indefinite
Gravity: 0.17Ă Earth
What happens: Bounce everywhere, jump 3 meters high
Experience: Like being a superhero!
How to Use the Gravity Simulator
Step 1: Enter Your Details
Input your weight (in kg or lbs), height, and physical characteristics. The calculator uses these to compute how you’d function on different worldsâyour weight, jump height, falling speed, and even bone stress under different gravity levels.
Step 2: Select Celestial Bodies
Choose from planets (Mercury through Neptune), moons (Luna, Titan, Europa), dwarf planets (Pluto, Ceres), or exotic objects (Sun’s surface, white dwarfs, neutron stars). Each has unique mass and radius determining surface gravity strength.
Step 3: Compare Results
View comparative data showing weight ratios, escape velocities, surface gravity in m/s² and g-forces. Understand why Mercury has no atmosphere (weak gravity), while Jupiter holds a massive envelope. See where humans could realistically live long-term.
Gravity Across the Solar System
đŞ Gas Giants (High Gravity)
Jupiter (2.5g), Saturn (1.1g), Uranus (0.9g), Neptune (1.1g). Massive planets with strong surface gravity (at cloud tops). Standing on Jupiter would feel like carrying 1.5Ă your body weight as a backpack. Use our Jupiter calculator for more.
đ Terrestrial Planets (Moderate)
Mercury (0.38g), Venus (0.9g), Earth (1g), Mars (0.38g). Rocky planets with walkable surfaces. Mars gravity makes colonization challengingâtoo weak for Earth-normal physiology but strong enough to make construction difficult.
đ Moons (Low Gravity)
Moon (0.16g), Europa (0.13g), Titan (0.14g), Ganymede (0.15g). Small bodies with weak gravity perfect for low-g exploration. You could jump 6Ă higher on the Moon! Explore lunar physics with our Moon gravity tool.
â Extreme Objects
Sun (28g), White Dwarf (350,000g), Neutron Star (200 billion g). Compact objects with crushing gravity. A neutron star’s gravity would compress you to atomic thickness instantly. Calculate extreme conditions with our neutron star tool.
Understanding Gravitational Physics
Surface Gravity Formula
g = GM/r² where G is gravitational constant (6.674Ă10âťÂšÂš), M is mass, r is radius. Earth’s g = 9.8 m/s². Jupiter has 318Ă Earth’s mass but only 11Ă radius, giving 2.5g. Density mattersâSaturn (95Ă Earth’s mass) has only 1.1g due to its huge size and low density.
Escape Velocity
v_escape = â(2GM/r). Earth: 11.2 km/s. Moon: 2.4 km/s (which is why it has no atmosphereâgas molecules exceed this speed). Jupiter: 60 km/s. Black holes have infinite escape velocity beyond event horizon. This determines whether a body can hold an atmosphere and affects mission delta-v requirements.
Tidal Forces
Gravity varies with distanceâyour feet experience slightly stronger gravity than your head. Near massive compact objects, this difference becomes extreme. The Roche limit defines where tidal forces rip objects apart. Saturn’s rings exist within its Roche limit. Black holes create “spaghettification”âstretching objects into noodles.
Frequently Asked Questions About Gravity
Why do astronauts float in the ISS if Earth’s gravity is still strong there?
They’re not escaping gravityâthey’re in continuous free fall! The ISS orbits at 400 km altitude where Earth’s gravity is still 90% as strong as the surface. But the station and everything in it are falling toward Earth at the same rate, creating apparent weightlessness. This is orbital mechanics: falling sideways fast enough that you keep missing the Earth. Gravity holds them in orbitâwithout it, they’d fly off into space in a straight line.
Could humans live long-term on Mars with only 38% Earth gravity?
Unknownâno humans have experienced partial gravity long-term. We know microgravity causes bone loss, muscle atrophy, cardiovascular changes, and vision problems. Mars’s 0.38g might be enough to prevent these issues, or it might not. Some scientists propose “gravity prescription” exercise regimens. Others suggest rotating habitats creating artificial 1g. We won’t know until we try, making early Mars missions essentially medical experiments in gravitational physiology.
What would happen to my body in Jupiter’s gravity?
At 2.5g, every movement would feel like carrying a heavy backpack. Your 70 kg body would weigh 175 kgâstanding up would strain your knees and back. Blood would pool in your legs, making your heart work harder. Extended exposure would likely cause cardiovascular problems and skeletal stress. However, humans can tolerate 2-3g for extended periods with training (fighter pilots experience this). The bigger problem is Jupiter has no solid surfaceâyou’d sink into crushing atmospheric pressure and extreme heat long before reaching “ground.”
Why doesn’t the Sun’s stronger gravity pull planets into it?
It does pullâconstantly! But planets have tangential velocity (sideways motion) that balances the inward pull. This creates stable orbitsâa continuous state of falling toward the Sun while moving sideways fast enough to keep missing it. If you stopped Earth’s orbital motion, it would plummet straight into the Sun in about 65 days. The balance between gravitational pull and orbital velocity is why planets maintain stable orbits for billions of yearsâit’s dynamic equilibrium, not static positioning.
Explore More Gravity and Physics Tools
Understand gravitational phenomena across the cosmos:
- Orbital Mechanics Calculator – Understand how gravity creates orbits
- Weight on Other Planets – Quick weight comparisons
- Tidal Force Calculator – Calculate gravitational gradients
- Roche Limit Calculator – When gravity tears objects apart
- Black Hole Gravity Simulator – Extreme gravitational physics
- Artificial Gravity Calculator – Design rotating space stations