How we worked it out
Updated as you change the numbers.
- T = 2π√(L ÷ g); L = g(T ÷ 2π)².
Method and assumptions
Accurate for swings under about 15°. A “seconds pendulum” (2 s period) is about 0.994 m long.
Questions
What is the period of a 1 m pendulum?
About 2.006 s.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.