Physics

Angular Momentum Calculator

Find angular momentum for rotation about a fixed principal axis.

SI units shown beside each fieldIdeal model explained below
Physics lab
Physics lab

Use the units beside each input and review the model assumptions.

See the method

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Your calculated quantity

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter moment of inertia, angular velocity.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
Moment of inertiaNumeric value. Unit: kg·m². Must be greater than zero.2
Angular velocityNumeric value. Unit: rad/s.10

Result for these sample inputs

20 kg·m²/s

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Angular momentum = moment of inertia × angular velocity.

A WORKED EXAMPLE

Using moment of inertia = 2 kg·m², angular velocity = 10 rad/s, the result is 20 kg·m²/s. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Methodology maintained by ClarityKit. How these tools are built and checked.