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 one-third 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 one-third 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 dropdown lets you switch between kilograms and pounds.

Click “calculate” to get the result below.

Weight on Mars formula

The formula to calculate your weight on Mars is as follows:

WMars = (WEarth / 9.81) * 3.2

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 3.2 m/s2.


Elena is a Canadian journalist and researcher. She has been looking at the sky for years and hopes to introduce more people to the wonderful hobby that is astronomy.