Did you know that on average, Mercury is really the closest planet to Earth? Despite not being our neighboring planet because those are Venus and Mars, due to how orbits work, Mercury spends more time closer to Earth than any of those other two planets.
Mercury is also one of the four planets that have a solid, rocky surface. This means that theoretically, a human could walk on the Mercurian surface if they had the proper equipment to withstand the extreme temperatures and lack of breathable atmosphere on the planet.
So, that begs the question, how much would you weigh on Mercury?
On Mercury, you would weigh approximately 38% of your current weight on Earth. This means that a person that weighs 70 kilograms (154 lbs) on Earth would weigh approximately 26 kilograms (58 lbs) on Mercury.
This is great news for any possibility of a manned mission to Mercury in the distant future. In order to survive the rough conditions of the Mercurian surface, a person would have to wear a very heavy spacesuit to protect them.
To give you an idea of how heavy astronaut suits are, the spacesuits that the Apollo astronauts used to walk on the Moon weighed about 163 kilograms (360 pounds) on Earth. Thankfully, on the Moon that weight was reduced to just 27 kilograms (60 pounds) which is still a lot, but it is manageable.
To precisely calculate your weight on Mercury you can use 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 Mercury 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.
Mercury
Weight on Mercury37.72 lb
Age on Mercury41.52 years
- Next birthday
- Add your birth date
- Jump
- 4.35 ft
- Year
- 88 Earth days
- Day
- 175.9 days
Your weight on the other worlds
- Venus90.42 lb16.25 years
- Moon16.51 lbn/a
- Mars37.82 lb5.32 years
- 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 Mercury itself?
If you were looking for the world rather than your own numbers, here is how heavy and how old Mercury is, next to Earth.
| Body | Mass | Compared with Earth | Age |
|---|---|---|---|
| Mercury | 3.3 × 1023 kg | About 1/18 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 Mercury formula
The formula to calculate your weight on Mercury is as follows:
WMercury = (WEarth / 9.81) * 3.7
WMercury: Weight on Mercury
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 Mercury, it is approximately 3.7 m/s2.
Worked example: weight on Mercury
A student has a mass of 45 kg. Weight is mass multiplied by gravity (W = m × g), measured in newtons (N).
- On Mercury: W = 45 kg × 3.70 m/s2 = 166.5 N
- On Earth: W = 45 kg × 9.81 m/s2 = 441.5 N
- A bathroom scale on Mercury would read 166.5 ÷ 9.81 = 17.0 kg, which is 37.7% of the Earth reading
The student’s mass is still 45 kg on Mercury. Only the pull of gravity on that mass changes. To work this out for any mass, turn on Homework mode in the calculator above.
