Pendulum Period Calculator
Small-angle pendulum period = 2π × √(length / gravity).
Open toolIdeal spring period = 2π × √(mass / stiffness). Undamped linear mass-spring motion.
Enter the inputs, then select Calculate.
Result will appear here
Ideal spring period = 2π × √(mass / stiffness).
Undamped linear mass-spring motion. Spring mass is neglected. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
Follow the labelled inputs.
Replace the example with oscillating mass (kg). The field labels specify the expected format and units.
Select Calculate. Review the calculated result, then copy it or download the result text.
The starting example produces 3.14159265359 s. Ideal spring period = 2π × √(mass / stiffness).

Read the labels for oscillating mass (kg) and spring constant (n/m). Undamped linear mass-spring motion.

Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.

Read the units and assumptions with the output.
Check the stated scope before you run it.
Undamped linear mass-spring motion. Spring mass is neglected. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
The input stays in this browser. Copy result and Download save the same displayed text.

Small-angle pendulum period = 2π × √(length / gravity).
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Open toolAnswers about using Spring Period Calculator and understanding its results.
Undamped linear mass-spring motion. Spring mass is neglected. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.
Check the calculated result, then copy or download it.