The "magic" doesn't disappear in "any" other units. Period = 2π√(length/g) So the "magic" holds in any units where the unit of time is the period of a pendulu

The "magic" doesn't disappear in "any" other units. Period = 2π√(length/g) So the "magic" holds in any units where the unit of time is the period of a pendulum with unit length.