The gravitational acceleration at the Moon’s surface is approximately 1.62 m/s².
That value is about one-sixth of Earth’s standard gravitational acceleration, 9.81 m/s². The difference exists because the Moon has much less mass than Earth, even though its radius is also smaller. A person’s mass does not change on the Moon, but their weight does because weight depends on local gravitational acceleration.
The commonly quoted 1.62 m/s² is a rounded value; more precise references often give approximately 1.625 m/s². Gravity is not perfectly uniform across the lunar surface. Differences in underground mass concentrations, called mascons, and variations in terrain produce small local changes.
The figure is also commonly confused with 0.38 m/s², which is approximately the surface gravity of Mars, or 3.71 m/s², Mars’s actual surface-gravity value. Lunar astronauts therefore appeared to move with bounding steps, but their spacesuits and life-support equipment still had substantial mass and remained difficult to handle.