Mercury
Venus
Earth
Moon
Mars
Jupiter
Saturn
Uranus
Neptune
Select the celestial body you want to know your weight on.
Your Estimated Weight
— kg
Planet Gravity— m/s²
Gravity Ratio—
Your Mass (kg)— kg
Formula: Your Weight on Planet = Your Earth Weight (kg) × (Planet's Surface Gravity / Earth's Surface Gravity)
This calculation uses your Earth mass and the planet's surface gravity relative to Earth's.
Weight Comparison Across Solar System
Compare your estimated weight on various celestial bodies relative to your Earth weight.
Surface Gravity of Solar System Bodies
Body
Surface Gravity (m/s²)
Gravity Ratio (vs Earth)
What is Calculating Weight on Other Planets?
{primary_keyword} involves understanding the fundamental principles of gravity and mass. While your mass remains constant regardless of location, your weight, which is the force exerted on you by gravity, changes depending on the gravitational pull of the celestial body you are on. This calculator provides an easy way to estimate how much you would weigh on different planets in our solar system, helping to visualize the vast differences in planetary gravity. It's a fascinating concept for anyone curious about space, physics, or the unique characteristics of our cosmic neighbors.
Who should use this calculator? Anyone with an interest in space exploration, physics enthusiasts, students learning about gravity, or even those simply curious about how their perceived weight would change on other worlds. It's a tool for education, curiosity, and a bit of fun.
Common misconceptions about {primary_keyword} often revolve around confusing mass and weight. Many people think their "weight" changes because their body composition alters, or that mass itself fluctuates. However, mass is a measure of the amount of matter in an object, which is constant. Weight is a force, dependent on mass and the local gravitational acceleration.
{primary_keyword} Formula and Mathematical Explanation
The core of {primary_keyword} lies in a simple proportional relationship based on gravity. Here's the breakdown:
Weight is the force of gravity acting on an object's mass. The formula for weight (W) is:
W = m × g
Where:
W is weight (force, often measured in Newtons)
m is mass (amount of matter, measured in kilograms)
g is acceleration due to gravity (measured in meters per second squared, m/s²)
On Earth, your weight is your mass multiplied by Earth's gravitational acceleration (approximately 9.81 m/s²). When you consider another planet, your mass (m) remains the same, but the gravitational acceleration (gplanet) changes.
So, your weight on a planet (Wplanet) would be:
Wplanet = m × gplanet
Since mass (m) is constant, and we know your weight on Earth (Wearth = m × gearth), we can express mass as m = Wearth / gearth. Substituting this back into the planet weight formula:
Wplanet = (Wearth / gearth) × gplanet
Rearranging this gives us the practical formula used in the calculator:
Your Weight on Planet = Your Earth Weight × (Planet's Surface Gravity / Earth's Surface Gravity)
This formula essentially scales your Earth weight based on the ratio of gravitational forces.
Variables Explained
Variables Used in the Calculation
Variable
Meaning
Unit
Typical Range (Planetary)
Your Earth Weight
The gravitational force exerted on your mass on Earth's surface.
Kilograms (kg)
Generally 30-200 kg for adult humans.
Planet's Surface Gravity
The acceleration due to gravity at the surface of the specific planet or moon.
meters per second squared (m/s²)
0.16 (Moon) to 24.79 (Jupiter)
Earth's Surface Gravity
The standard acceleration due to gravity at Earth's surface.
meters per second squared (m/s²)
Approximately 9.81 m/s²
Gravity Ratio
The ratio of a planet's surface gravity to Earth's surface gravity.
Unitless
0.16 (Moon) to 2.53 (Jupiter)
Your Mass
The intrinsic amount of matter in your body, constant everywhere.
Kilograms (kg)
Constant, derived from Earth weight.
Practical Examples (Real-World Use Cases)
Understanding {primary_keyword} can make space exploration more tangible. Here are a couple of examples:
Example 1: A Trip to Mars
Let's say an astronaut weighs 85 kg on Earth. Mars has a surface gravity of approximately 3.71 m/s², while Earth's is 9.81 m/s². Using the calculator or formula:
Your Earth Weight: 85 kg
Planet: Mars
Mars Gravity: 3.71 m/s²
Earth Gravity: 9.81 m/s²
Gravity Ratio (Mars/Earth): 3.71 / 9.81 ≈ 0.378
Calculation: 85 kg × 0.378 ≈ 32.13 kg
Interpretation: On Mars, this astronaut would feel like they weigh approximately 32.13 kg. This significantly lower weight affects movement, the structural integrity needed for suits, and the physiological adaptations required for long-term stays.
Example 2: Experiencing Jupiter's Immense Gravity
Consider a person weighing 60 kg on Earth. Jupiter, despite being a gas giant, has a high surface gravity equivalent of about 24.79 m/s² at its cloud tops (where we define "surface" for comparison). Earth's gravity is 9.81 m/s².
Your Earth Weight: 60 kg
Planet: Jupiter
Jupiter Gravity: 24.79 m/s²
Earth Gravity: 9.81 m/s²
Gravity Ratio (Jupiter/Earth): 24.79 / 9.81 ≈ 2.53
Calculation: 60 kg × 2.53 ≈ 151.8 kg
Interpretation: On Jupiter, this individual would feel like they weigh approximately 151.8 kg. The immense gravitational pull would make standing, walking, or any physical activity incredibly difficult, if not impossible, without significant support. This highlights why gas giants are not suitable for human surface exploration.
How to Use This {primary_keyword} Calculator
Our calculator is designed for simplicity and accuracy. Follow these steps:
Enter Your Earth Weight: Input your current weight in kilograms (kg) into the "Your Weight on Earth (kg)" field.
Select a Planet: Use the dropdown menu to choose the celestial body (planet or moon) you're curious about. The default is Earth for reference.
Calculate: Click the "Calculate" button.
How to Read Results:
Primary Result: The large number displayed is your estimated weight on the selected planet in kilograms.
Planet Gravity: Shows the surface gravitational acceleration of the chosen planet in m/s².
Gravity Ratio: Indicates how much stronger or weaker the gravity is compared to Earth's. A ratio greater than 1 means stronger gravity; less than 1 means weaker.
Your Mass (kg): This is your actual mass, which remains constant. The calculator derives it from your Earth weight to show you the underlying invariant quantity.
Table: The table provides a quick reference for the surface gravity and gravity ratio of various solar system bodies.
Chart: Visualizes the weight comparison, making it easy to see the relative differences.
Decision-Making Guidance: While this tool is primarily educational, the results underscore the significant impact of gravity. For space agencies, understanding these variations is crucial for mission planning, astronaut training, and designing equipment that can withstand different gravitational forces. For enthusiasts, it offers a fun perspective on the wonders of the universe.
Key Factors That Affect {primary_keyword} Results
While the calculation itself is straightforward, several underlying factors influence why these numbers differ so dramatically:
Mass of the Celestial Body: More massive planets generally exert a stronger gravitational pull, assuming similar densities. Jupiter, being the most massive planet, has the strongest gravity among the planets.
Radius of the Celestial Body: Gravity's strength also depends on the distance from the center of mass. For objects of similar mass, a smaller radius means the surface is closer to the center, resulting in stronger surface gravity. This is why Earth has stronger gravity than the Sun, despite the Sun being vastly more massive (its radius is also vastly larger).
Distance from the Sun: While not directly in the weight calculation formula, the Sun's gravity is the dominant force in the solar system, keeping planets in orbit. Its own surface gravity is immense but not directly comparable for human weight due to its gaseous nature and extreme conditions.
Composition and Density: Although mass is the primary driver, the distribution of that mass matters. Planets with denser cores or compositions can have slightly different surface gravity profiles than less dense bodies of the same mass.
Atmospheric Pressure: While atmospheric pressure is a force acting on you, it's distinct from gravitational pull. Very thick atmospheres (like Venus) can exert significant pressure, but the weight calculation focuses solely on the force of gravity pulling you down.
Altitude: On any celestial body, gravity decreases slightly with altitude. Our calculator assumes surface gravity, which is the standard comparison point. For extremely precise calculations at different altitudes, a more complex formula involving the square of the distance from the center of mass would be needed.
Rotation Rate: A planet's rotation causes a slight centrifugal effect, which can marginally reduce the *effective* surface gravity, especially near the equator. This effect is usually small compared to the overall gravitational pull differences between planets.
Frequently Asked Questions (FAQ)
What is the difference between mass and weight?
Mass is the amount of matter in an object and is constant everywhere. Weight is the force of gravity acting on that mass, and it varies depending on the gravitational field. Your mass stays the same on Earth, the Moon, or Jupiter, but your weight changes.
Why is Jupiter's gravity so high?
Jupiter is the most massive planet in our solar system. Its immense mass creates a powerful gravitational field at its surface (or cloud tops, as it has no solid surface).
Can I actually survive on another planet based on these weights?
This calculator only shows your perceived weight. It does not account for other critical factors like atmosphere composition, temperature, radiation, or pressure, which are often far more dangerous than the gravity itself.
Does the Moon have gravity?
Yes, the Moon has gravity, but it's significantly weaker than Earth's, about 1/6th the strength. This is why astronauts could jump much higher on the Moon.
Is the weight calculated in Newtons or kilograms?
The calculator displays weight in kilograms (kg) for easier comparison with your Earth weight. Technically, weight is a force measured in Newtons (N). The calculator converts the force back into an equivalent mass unit (kg) based on Earth's gravity for intuitive understanding.
What does the "Gravity Ratio" mean?
The Gravity Ratio compares the surface gravity of the selected planet to Earth's surface gravity. For example, a ratio of 0.16 for the Moon means its gravity is 16% as strong as Earth's. A ratio of 2.53 for Jupiter means its gravity is 2.53 times stronger than Earth's.
Why is Saturn's gravity lower than Earth's despite its size?
Although Saturn is large, it is much less dense than Earth. Its lower average density means that for its volume, its mass is not proportionally as great, leading to weaker surface gravity compared to Earth.
How does this calculation apply to future space missions?
Understanding variations in gravity is essential for designing spacecraft, habitats, and spacesuits. It also informs astronaut training protocols and medical research into the long-term effects of different gravitational environments on the human body.