Pendulum & Spring Period Calculator

Which oscillator to analyse; it changes the fields shown.

• Simple pendulum: a mass swinging on a string, set by its length.
• Mass on a spring: set by the mass and the spring stiffness.

Length of the pendulum from pivot to bob, in metres. A longer pendulum swings more slowly.

A 1 m pendulum has a period of about 2 seconds on Earth.

Gravitational acceleration, which drives the pendulum's swing.

Earth is 9.81 m/s²; weaker gravity means a slower swing.

Mass hanging on the spring, in kilograms. A bigger mass oscillates more slowly.

Stiffness of the spring, in newtons per metre — the force needed to stretch it one metre.

A stiffer spring gives a faster oscillation.