About the Pendulum Calculator
Solves T = 2π√(L/g) for period, length, or gravity.
What it is
Enter any two of period, length, and gravity, and the calculator solves for the third, along with frequency and an animated pendulum swinging at the computed period.
Features
Solve for T, L, or g
Any two values give the third.
Gravity presets
Earth, Moon, Mars, or a custom value.
Animated pendulum
Swings at a rate scaled from the computed period.
Small-angle check
Warns when the swing amplitude exceeds ~15°.