Pendulum Calculator
Period from Length
Length from Period
Formula
T = 2π√(L/g), where L is the pendulum length and g is gravitational acceleration (9.81 m/s² on Earth).
Frequently Asked Questions
What factors affect a pendulum's period?
For a simple pendulum, only the length and gravitational acceleration affect the period. Mass and amplitude (for small angles) do not.
Does this formula work for large swings?
This formula is accurate for small angles (less than about 15°). For larger amplitudes, a more complex elliptic integral solution is needed.