The surface gravity of Mars is 3.71 meters per second squared. Because Earth's gravity is 9.8 meters per second squared, Mars' gravity is approximately 38 percent less than the Earth's. Mars' mass is also less than Earth's, which is a contributing factor in this planet having a lower surface gravity.
Although Mars is smaller than Earth, there are certain elements that these planets have in common, such as they are both terrestrial planets with solid surfaces and have polar caps. The other two terrestrial planets in the solar system are Mercury and Venus.
The differences between these planets include their atmospheres, atmospheric pressures, year lengths and surface temperatures. For example, the average temperature on Mars is -81 degrees Fahrenheit, and Earth's average temperature is 57 degrees.