Momentum (p = mv) is the "quantity of motion" of an object. A heavy truck moving slowly can have the same momentum as a small ball moving very fast. It's conserved in collisions.

What is conservation of momentum?

In a closed system with no external forces, total momentum before = total momentum after any collision or interaction. This is why billiard balls transfer motion the way they do.

Momentum Calculator

Quick answer: Enter mass (kg) and velocity (m/s) to calculate momentum in kg⋅m/s.

Calculate linear momentum (p = mv) from an object's mass and velocity. Momentum is a conserved quantity in physics — the total momentum of a closed system is constant.

Last reviewed: April 2026Report an error

Mass (kg)

Velocity (m/s)

Momentum

700.00 kg⋅m/s

Momentum: 700.00 kg⋅m/s.

Momentum (kg⋅m/s)

700.00

How to Use This Momentum Calculator

1Enter the mass of the object in kilograms.
2Enter the velocity in meters per second.
3Read the momentum in kg⋅m/s.

Frequently Asked Questions

: Momentum (p = mv) is the "quantity of motion" of an object. A heavy truck moving slowly can have the same momentum as a small ball moving very fast. It's conserved in collisions.
: In a closed system with no external forces, total momentum before = total momentum after any collision or interaction. This is why billiard balls transfer motion the way they do.

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Momentum Calculator

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