Martian Year

The martian year is approximately 1.88 times longer than a year on Earth. Because of this, a Martian who says he is 20 on Mars would be about 37 and a half in terms of Earth years. So anytime you want to convert between an age on Earth versus on Mars, you multiply or divide by 1.88. When going from Martian to Earth years you multiply by 1.88, and when going from Earth to Martian years you divide by 1.88.