Momentum Calculator
Calculate linear momentum from mass and velocity using momentum equals mass times velocity, in kilogram metres per second.
Last reviewed by the Radiatus Cloud team
Calculate linear momentum from mass and velocity.
Need this done properly for your business?
Radiatus delivers secure cloud, DevOps & compliance engineering.
Calculate linear momentum
Momentum is a measure of the quantity of motion an object has, calculated as mass multiplied by velocity. The result is expressed in kilogram metres per second when mass is in kilograms and velocity in metres per second. A three-kilogram object moving at eight metres per second has a momentum of twenty-four kilogram metres per second. Momentum is a vector, so it has direction as well as magnitude, following the direction of the velocity.
This calculator gives the magnitude from the mass and velocity you enter.
Why momentum matters
Momentum is central to understanding collisions and interactions, because the total momentum of an isolated system is conserved. This principle lets physicists and engineers predict the outcomes of impacts, from billiard balls to car crashes to rocket propulsion. The larger an object's momentum, the harder it is to stop, which is why both mass and speed contribute to the force of an impact.
Momentum connects to force through impulse: a force applied over time changes an object's momentum. Keep units consistent for a correct result. All calculation happens locally in your browser.
Related tools
- Security Term Translator — Translate complex security jargon into business language.
- Security Myth vs Reality — Fact-check common security myths.
- Breach News Impact — Contextualize major breaches into understandable analogies.
- Config Safety Analyzer — Paste a config snippet to check for obvious safety issues.
Frequently Asked Questions
What is the momentum formula?
Momentum equals mass times velocity, giving kilogram metres per second when mass is in kilograms and velocity in metres per second.
Is momentum a vector?
Yes. Momentum has both magnitude and direction, pointing the same way as the velocity. This calculator reports its magnitude.
What is conservation of momentum?
In an isolated system with no external forces, the total momentum stays constant, which governs the outcome of collisions and interactions.
How does momentum relate to force?
Impulse, the force applied times the time it acts, equals the change in momentum, linking the two quantities.
Why is momentum important in collisions?
Because total momentum is conserved, knowing the momenta before a collision lets you predict the motion afterward.
Privacy & Security
Everything runs in your browser; nothing is uploaded.
How to Use
Enter mass and velocity.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.