Momentum Calculator
Calculate linear momentum from an object's mass and velocity instantly with this free physics momentum calculator in your browser.
Enter Values
How to use this calculator
- Enter mass (kg) and velocity (m/s).
- Read the momentum in kg·m/s.
How it works
Momentum = mass × velocity. It points in the direction of motion.
Worked example
10 kg at 5 m/s. Momentum = 50 kg·m/s.
Common mistakes
- Confusing momentum with kinetic energy — momentum is linear in speed, energy is squared.
- Dropping the sign — velocity (and momentum) has a direction.
Frequently asked questions
How is momentum calculated?
Momentum = mass × velocity, measured in kg·m/s. It is a vector, so direction matters.
Why is momentum important?
It is conserved in collisions, so total momentum before equals total after — the basis for analysing impacts and recoil.
How is momentum different from kinetic energy?
Momentum (mv) scales with speed; kinetic energy (½mv²) scales with speed squared.
Related tools
- Kinetic Energy Calculator
- Acceleration Calculator
- Potential Energy Calculator
- Reynolds Number Calculator
- Specific Heat Calculator
- Speed, Distance & Time Calculator
Explore more in Maths, Education & Science.
Cite this tool
Zerdly. (2026). Momentum Calculator. Retrieved from https://www.zerdly.com/tools/momentum-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.