Simple Pendulum Period Calculator
Period and frequency of a simple pendulum, with the large-amplitude correction.
How to use the Simple Pendulum Period Calculator
- Enter or select: Length L, Gravity g, Amplitude θ₀.
- The results (Period (small angle), Period (amplitude corrected), Frequency) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- T = 2π√(L/g)
- Exact: T = T₀ / AGM(1, cos(θ₀/2))