Enter the acceleration due to gravity and the length of a pendulum to calculate the pendulum period and frequency. On earth the acceleration due to gravity is always approximately 9.81 m/s^2.
The following two formulas are used to calculate the period and frequency of a simple pendulum. In this case, a simple pendulum is described as having no other external forces acting on it. This includes air resistance.
T = 2π * √(L/g)
- Where T is the period (seconds)
- L is the length
- g is the acceleration due to gravity
f = 1/T = 1/2π * √(g/L)
- Where f is the frequency
- L and g are length and acceleration as before