basic

Simple Pendulum Period & Length Calculator

T = 2π√(L/g) — period from pendulum length.

Calculates the period (or length) of a simple pendulum from its length and local gravitational acceleration.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

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); f = 1/T; g ≈ 9.806 m/s²

In depth

Calculates the period (or length) of a simple pendulum from its length and local gravitational acceleration.