Momentum Calculator
Linear momentum p = mv, with kinetic energy shown alongside.
Momentum Calculator
| Momentum | 6.0000 kg·m/s |
| Kinetic energy (bonus) | 9.0000 J |
A 2 kg object at 3 m/s has momentum 6 kg·m/s and kinetic energy 9 J.
Momentum measures how much motion an object carries: mass times velocity. Unlike kinetic energy, momentum is a vector and is conserved in collisions, which makes it central to collision analysis.
Enter mass and velocity to get momentum in kg·m/s, plus the object's kinetic energy as a bonus so you can compare the two quantities directly.
The formula
Worked example
A 2 kg object at 3 m/s has momentum 6 kg·m/s and kinetic energy 9 J.
The example is pre-loaded in the result panel — press Calculate with your own numbers to replace it.
Frequently asked questions
How do momentum and kinetic energy differ?
Momentum grows in direct proportion to velocity (p = mv), while kinetic energy grows with velocity squared. In a perfectly elastic collision both are conserved; in an inelastic collision only momentum is.
What is impulse?
Impulse is force × time, and it equals the change in momentum. It is why airbags and crumple zones help: they stretch the stopping time, reducing the force for the same momentum change.
Category: Science calculators
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