Formula
This calculator uses the standard simple pendulum calculator formula:
Frequently Asked Questions
T = 2π√(L/g), where L is the pendulum length in metres and g is gravitational acceleration (9.81 m/s² on Earth). The period does not depend on mass or amplitude for small swings.
Rearranging: L = g × (T/2π)² = 9.81 × (1/2π)² ≈ 0.248 m (about 24.8 cm).
No. For a simple pendulum, period depends only on length and gravitational acceleration, not the mass of the bob.
T = 2π√(1/9.81) ≈ 2.006 seconds. A 1-metre pendulum completes approximately one full swing every 2 seconds.
Lower gravity means a longer period (slower swing). For example, on the Moon (g=1.62 m/s²), a 1-metre pendulum has T = 2π√(1/1.62) ≈ 4.94 seconds.
Period (T) is the time for one complete oscillation. Frequency (f) is the number of oscillations per second. f = 1/T. For example, T=2s gives f=0.5 Hz.