Instantly convert your Earth weight to Lunar weight based on gravitational physics.
Enter your weight on Earth (Mass in gravity field).
Please enter a positive number.
Pounds (lbs)
Kilograms (kg)
Stone (st)
Select your preferred unit for calculation.
No, Body Weight Only
Yes, Full Astronaut Gear
Modern EVA suits add significant mass.
Your Weight on the Moon
24.8 lbs
Weight Difference (Loss)-125.2 lbs
Moon Gravity Ratio16.54% of Earth
Effective Mass CategoryStandard
Formula Used: WeightMoon = (WeightEarth + Gear) × 0.1654
Comparative Weight Analysis (Earth vs. Celestial Bodies)
Celestial Body
Relative Gravity
Your Weight (lbs)
Estimated weight based on standard gravitational parameters.
Results copied to clipboard!
What is a Weight on the Moon Calculator?
A weight on the moon calculator is a specialized educational and physics tool designed to compute how much an object or person would weigh on the lunar surface. While your mass remains constant throughout the universe, your weight changes depending on the gravitational pull of the celestial body you are standing on.
This tool is essential for students studying astronomy, physics enthusiasts, and sci-fi writers who need accurate data for their work. Unlike generic weight converters, a dedicated weight on the moon calculator accounts for the specific gravitational coefficient of the Moon ($1.625 m/s^2$) relative to Earth's standard gravity ($9.807 m/s^2$).
Common misconceptions often conflate "mass" with "weight." Mass is the amount of matter in an object (measured in kg), whereas weight is the force exerted by gravity on that mass (measured in Newtons, though commonly expressed in lbs or kg-force for convenience). This calculator demonstrates the dramatic difference gravity makes on perceived weight.
Weight on the Moon Formula and Mathematical Explanation
To calculate weight on the moon manually, you need to understand the relationship between Earth's gravity and lunar gravity. The Moon has approximately 1/6th the mass of Earth, resulting in a much weaker gravitational field.
The Core Formula
The mathematical formula used by our weight on the moon calculator is derived as follows:
$$W_m = W_e \times 0.1654$$
Where:
$W_m$ = Weight on the Moon
$W_e$ = Weight on Earth
0.1654 = The ratio of Lunar gravity ($1.625 m/s^2$) to Earth gravity ($9.807 m/s^2$)
Variables Table
Variable
Meaning
Unit
Typical Range
$W_e$ (Input)
Your Weight on Earth
lbs, kg, st
40 – 400+
$g_{moon}$
Acceleration due to gravity (Moon)
$m/s^2$
1.625 (Constant)
$g_{earth}$
Acceleration due to gravity (Earth)
$m/s^2$
9.807 (Constant)
Ratio
Conversion Factor
Decimal
~0.165 (16.5%)
Variables defining the gravitational weight conversion.
Practical Examples (Real-World Use Cases)
Understanding the theoretical math is easier with practical examples. Below are two scenarios using our weight on the moon calculator.
Example 1: The Average Adult
Consider an adult male weighing 180 lbs on Earth.
Input: 180 lbs
Calculation: $180 \times 0.1654$
Result: 29.77 lbs
Interpretation: On the Moon, this person would feel as light as a small child does on Earth. Movements would feel springy and jumps would be significantly higher.
Example 2: The Astronaut with Gear
NASA's Extravehicular Mobility Unit (EMU) spacesuit weighs approximately 275 lbs (125 kg) on Earth. An astronaut weighing 160 lbs puts on the suit.
Total Earth Weight: 160 + 275 = 435 lbs
Calculation: $435 \times 0.1654$
Result: 71.95 lbs
Interpretation: Despite carrying heavy life-support equipment that is nearly impossible to walk with on Earth, the astronaut on the Moon feels like they are only carrying a light backpack. This explains why Apollo astronauts could hop around easily despite wearing massive suits.
How to Use This Weight on the Moon Calculator
Enter Your Earth Weight: Input your current weight in the first field. Ensure the number is positive.
Select Unit: Choose between Pounds (lbs), Kilograms (kg), or Stone (st) based on your preference.
Gear Selection: Toggle the "Include Space Suit Weight" option if you want to simulate a realistic astronaut scenario. This adds standard NASA suit mass to the calculation.
Review Results: The primary box shows your lunar weight. The "Weight Difference" tells you exactly how much "lighter" you would feel.
Analyze the Chart: Look at the bar chart to visually compare your weight on Earth vs. the Moon and Mars.
Key Factors That Affect Weight on the Moon Results
While the calculation seems simple, several physical factors influence the precise "weight on the moon calculator" results in a scientific context.
1. Mass Constancy
Your mass (the number of atoms in your body) never changes. If you have a mass of 80kg on Earth, you have a mass of 80kg on the Moon. Only the force pulling that mass down changes.
2. Gravitational Anomalies (Mascons)
The Moon's gravity is not perfectly uniform. There are regions with higher density concentrations called "mass concentrations" or mascons. While our calculator uses the average, standing over a large lunar crater or basin could minutely affect the reading.
3. Centrifugal Force
On Earth, the planet's rotation reduces your weight slightly at the equator due to centrifugal force. The Moon rotates much slower (once every 27 days), so this effect is negligible compared to Earth.
4. Altitude
Just like on Earth, gravity decreases as you move further from the center of mass. Standing on the peak of Mons Huygens (the Moon's tallest mountain) would result in a fractionally lower weight than standing in a deep crater.
5. Equipment and Life Support
As shown in the examples, your biological weight is rarely your functional weight in space. Without an atmosphere, you must wear a pressurized suit. This adds significant mass that must be accelerated and decelerated, even if it "weighs" less.
6. Inertia
While you weigh less, your inertia remains the same. Starting to move or stopping a movement requires the same amount of force as on Earth. This mismatch between low weight and high inertia often causes astronauts to stumble.
Frequently Asked Questions (FAQ)
Is weight on the Moon calculator accurate for other planets?
No, this specific calculator is tuned for Lunar gravity (16.5% of Earth). Mars, for example, has about 38% of Earth's gravity. You should use a planetary specific tool or check the comparison table below our main result for other bodies.
Would I be able to jump higher on the Moon?
Yes. Since your leg muscles can generate the same force as on Earth, but are fighting much less downward gravitational pull, you could jump approximately 6 times higher on the Moon.
Does my mass change on the Moon?
No. Mass is invariant. You are made of the same amount of matter. Only your weight (the force of gravity acting on that matter) changes.
Why is the Moon's gravity so weak?
Gravity is directly proportional to mass. The Moon is much smaller and less dense than Earth (about 1.2% of Earth's mass), resulting in a much weaker gravitational field.
What is the "Stone" unit option?
Stone is a unit of weight measurement used primarily in the UK and Ireland. One stone equals 14 pounds. Our calculator automatically handles the conversion for you.
Can I lose weight by going to the Moon?
Technically, yes, you lose "weight." However, you do not lose "fat" or "mass." For health purposes, weight loss refers to mass reduction, which traveling to the Moon does not provide.
How does the space suit affect the calculation?
A standard EVA suit weighs about 240-280 lbs on Earth. Our calculator adds a standardized value to your input to show you the "working weight" an astronaut experiences.
Is the gravity on the Moon exactly 1/6th of Earth?
It is very close, but not exactly. It is approximately 16.54%, whereas exactly 1/6th is 16.66%. The difference is minor but scientifically relevant.
Related Tools and Internal Resources
Explore more of our physics and conversion tools to better understand the universe around us.