Unit for acceleration due to gravity?

Acceleration due to gravity is expressed in the same units as any other acceleration ... Meters per second per second = m/s2 Also feet per second per second = ft/sec2 Any unit with dimensions of...

Meters / second2, or the equivalent Newtons / kg.

Sir Isaac Newton was the first to postulate gravity as we know it; a force exerted by anything with mass on anything else with mass, according to the product of the masses used and inversely...

9.81 m/s^2

At or near the surface of the earth, it's 9.8 meters (32.2 feet) per second2 . It's different at significant altitudes above the earth's surface, or on the surface of other, extraterrestrial bodies.