Momentum calculator

Momentum = mass × velocity.

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Mass (kg)

Velocity (m/s)

Answer

…

Momentum = mass × velocity.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

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Formula and assumptions

Linear momentum along one axis. Preserve the velocity sign for direction; relativistic effects are excluded.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Momentum calculator

Momentum = mass × velocity.

Linear momentum along one axis. Preserve the velocity sign for direction; relativistic effects are excluded.

Next: Force calculator

A worked example

With mass (kg) = 10, velocity (m/s) = 3, the momentum (kg·m/s) is 30.

Next: Impulse calculator

Before you use the result

Linear momentum along one axis. Preserve the velocity sign for direction; relativistic effects are excluded.

Example results for mass (kg)

These examples use Velocity (m/s): 3. They are reference calculations, not recommended settings.

Mass (kg)	Momentum (kg·m/s)
5	15
10	30
20	60

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ToolOctopus. “Momentum calculator.” Updated 2026-09-26. https://tooloctopus.com/momentum-calculator.

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