Pendulum Period Calculator
Calculate the period of a simple pendulum — the time for one complete swing — from its length, using T = 2π × √(L / g).
- Frequency
- 0.4984 Hz
Formula: T = 2π × √(L / g)
About Pendulum Period Calculator
Pendulum Period Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the period of a simple pendulum — the time for one complete swing — from its length, using T = 2π × √(L / g).
The calculation uses the standard formula T = 2π × √(L / g) and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
A pendulum about 0.994 m long has a period of almost exactly 2 seconds, the basis of the one-second tick of grandfather clocks.
Frequently Asked Questions
Is Pendulum Period Calculator free to use?
Yes. Pendulum Period Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (T = 2π × √(L / g)) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
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