A person who weighs 150 pounds on Earth weights approximately 24.9 pounds on the moon. Weight on the moon is about one-sixth or 16.6 percent of what it is on Earth.
Weight is equal to mass times gravity. The mass of the 150-pound person does not change on the moon, but since the gravity of the moon is one-sixth that of the gravity on the Earth, the weight of the person changes accordingly. To calculate an individual person's (or an object's) moon weight, multiply the Earth weight by 0.16, or for a slightly rougher calculation, divide the Earth weight by six.