Momentum Calculator

Use p = mv to calculate momentum in kg·m/s and related units from common mass and speed inputs.

Mass

Velocity

—kg·m/s

—N·s equivalent

—lb·ft/s

—direction sign

—p = mv

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

How to use this Momentum Calculator

Calculate linear momentum from mass and velocity. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.