Pendulum Calculator
Find the period and frequency of a simple pendulum. The result updates as you type, with the working underneath so you can check it.
Your details
Result
Period
2.00641 s
- Frequency
- 0.498403 Hz
- Accurate for small swings (under about 15°). A 1 m pendulum swings in about 2.006 s.
Good to know: T = 2π√(L ÷ g)
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
About this tool
Formula
T = 2π√(L ÷ g)
Questions people ask
Does the mass of the pendulum matter?
No. The period depends only on length and gravity, for small swings.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it. How we check our calculators