Force calculator

Net force = mass × acceleration.

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Mass (kg)

Acceleration (m/s²)

Answer

…

Net force = mass × acceleration.

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

Newton’s second law here assumes constant mass and one chosen direction. Negative acceleration means the opposite direction.

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 Force calculator

Net force = mass × acceleration.

Newton’s second law here assumes constant mass and one chosen direction. Negative acceleration means the opposite direction.

Next: Acceleration calculator

A worked example

With mass (kg) = 10, acceleration (m/s²) = 3, the net force (n) is 30.

Next: Momentum calculator

Before you use the result

Newton’s second law here assumes constant mass and one chosen direction. Negative acceleration means the opposite direction.

Example results for mass (kg)

These examples use Acceleration (m/s²): 3. They are reference calculations, not recommended settings.

Mass (kg)	Net force (N)
5	15
10	30
20	60

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ToolOctopus. “Force calculator.” Updated 2026-09-26. https://tooloctopus.com/force-calculator.

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