Does the pendulum's mass affect the period?

No, for a simple pendulum, mass cancels out of the equation entirely — only length and gravitational acceleration determine the period.

Does this work for large swing angles?

This formula is accurate for small-angle oscillations (roughly under 15°). At larger angles, the true period is slightly longer than this formula predicts.

Pendulum Period Calculator

Calculate the period of a simple pendulum — the time for one complete back-and-forth swing — based on its length and local gravitational acceleration. Valid for small swing angles (under about 15°).

Inputs

Results

Period: 2.006 seconds

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Formula

T = 2π × √(L / g)

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