Mars is approximately half the size of Earth. This means that its gravity pull is much weaker and as a result, if you were to stand on its surface, you would weigh only about 38% of your weight on Earth.
This is good news because in able to survive on the Martian surface, you would have to use a very heavy spacesuit with a lot of components. The most basic gear necessary to survive on Mars would be an oxygen tank, a heating system, CO2 ventilation, some way to measure vitals, and a large battery backpack to power it all up. All that equipment can get quite heavy. To give you an idea of how much weight that is, the spacesuits that the Apollo astronauts used to walk on the Moon weighed about 163 kilograms (360 pounds) on Earth. On the Moon that translated to only 27 kilograms (60 pounds) which is still considerable but a lot more manageable.
So, how much would you weigh on Mars?
Your weight on Mars would be approximately 38% of your current weight on Earth. That means that a 70 kg (154 lbs) person would weigh 26.5 kg (58 lbs) on Mars. That number can be precisely calculated with a simple rule of three that factors in the difference between the force of gravity on both planets.
The following calculator simplifies the process.
Weight on Mars calculator
If you want to skip the calculation, just fill out the following calculator. The kg / lb switch changes the unit.
The result updates as you type. Add your birthday to see your age on the same planet too.
Results for a 100 lb person aged 10 years.
Mars
Weight on Mars37.82 lb
Age on Mars5.32 years
- Next birthday
- Add your birth date
- Jump
- 4.34 ft
- Year
- 687 Earth days
- Day
- 24.66 hours
Your weight on the other worlds
- Mercury37.72 lb41.52 years
- Venus90.42 lb16.25 years
- Moon16.51 lbn/a
- Jupiter252.70 lb0.84 years
- Saturn106.42 lb0.34 years
- Uranus90.42 lb0.12 years
- Neptune113.66 lb0.06 years
- Pluto6.32 lb0.04 years
- Sun2,793.07 lbn/a
See your age and weight on every planet →
Homework mode: show the working
Enter a mass in kilograms and an age in years. Every answer below shows the formula with your numbers.
Did you mean Mars itself?
If you were looking for the world rather than your own numbers, here is how heavy and how old Mars is, next to Earth.
| Body | Mass | Compared with Earth | Age |
|---|---|---|---|
| Mars | 6.42 × 1023 kg | About 1/9 of Earth's mass | 4.5 billion years |
| Earth | 5.97 × 1024 kg | The reference: 1 Earth | 4.54 billion years |
Gravity, orbit and rotation figures: NASA NSSDCA planetary fact sheets.
Want the other planets too? See your weight and age on every planet, plus how high you could jump on each one.
Weight on Mars formula
The formula to calculate your weight on Mars is as follows:
WMars = (WEarth / 9.81) * 3.71
WMars: Weight on Mars
WEarth: Weight on Earth
The other two numbers are the force of gravity on each planet and it is given in meters per square second (m/s2). The force of gravity on Earth is 9.81 m/s2 and on Mars, it is approximately 3.71 m/s2.
