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Pendulum Period Calculator

Period of a simple pendulum from length and gravity.

Compute the period and frequency of a simple (small-angle) pendulum from its length and the local acceleration due to gravity.

Daniel Oh By Daniel Oh
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

m
m/s²

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

T = 2π · √(L / g); frequency f = 1/T.

In depth

Compute the period and frequency of a simple (small-angle) pendulum from its length and the local acceleration due to gravity.