How it works
Estimate the period of a simple pendulum for small angular oscillations, negligible friction and a point-like mass.
T = 2π√(L/g)
Worked example
Show example inputs and result
Pendulum length: 1 · Gravity: 9.80665.
- Period
- 2.00640929 s
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy