This calculates the weight on Mars from your weight on Earth. To find the Martian weight, we divide the weight on earth by the earth's force of gravity, which is 9.81m/s2. This calculates the mass of the object. Once we have the object's mass, we can find the weight by multiplying it by the gravitational force. Being that Mars has a gravitational force of 3.711m/s2, we multiply the object's mass by this quantity to calculate an object's weight on mars.