Pendulum Period Calculator — T = 2π√(L/g)
A pendulum's swing time depends only on its length and gravity — not on the mass of the bob or (for small swings) the amplitude.
Pendulum Period Calculator — T = 2π√(L/g)
How to interpret the result
A 1-meter pendulum swings with a period of about 2.0 s — the principle behind grandfather clocks, which use ~1 m pendulums for their 2-second beat.
Assumptions
- Small-angle approximation (swings under ~15°)
- Massless string, point-mass bob
- g = 9.81 m/s²