Calculate the time a simple pendulum takes to complete one full swing.
Pendulum Properties
Calculation Results
Enter length and angle
About this calculator
Overview
The period of a simple pendulum is the time it takes for the bob to return to its original position after being released. For small angles, it depends mainly on the length and gravity.
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Pro Tips
The mass of the bob does not affect the period of a simple pendulum.
The small-angle approximation (theta < 15°) is usually sufficient for basic physics.
A larger angle increases the period slightly due to non-linearity.
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Fun Facts
"Foucault's Pendulum was used to demonstrate the rotation of the Earth."
"On the Moon, a pendulum swings much more slowly due to the lower gravity (~1.62 m/s²)."
"Christiaan Huygens invented the first pendulum clock in 1656, greatly increasing timekeeping accuracy."
