Friction force calculator

Friction force magnitude = friction coefficient × normal force.

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Coefficient of friction

Normal force (N)

Answer

…

Friction force magnitude = friction coefficient × normal force.

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Precision and calculation record

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Step-by-step calculation

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Formula and assumptions

For a kinetic coefficient this estimates sliding friction. For a static coefficient it is the maximum available static friction, not necessarily the actual force.

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 Friction force calculator

Friction force magnitude = friction coefficient × normal force.

For a kinetic coefficient this estimates sliding friction. For a static coefficient it is the maximum available static friction, not necessarily the actual force.

Next: Basic calculator

A worked example

With coefficient of friction = 0.3, normal force (n) = 100, the friction force magnitude (n) is 30.

Before you use the result

For a kinetic coefficient this estimates sliding friction. For a static coefficient it is the maximum available static friction, not necessarily the actual force.

Example results for coefficient of friction

These examples use Normal force (N): 100. They are reference calculations, not recommended settings.

Coefficient of friction	Friction force magnitude (N)
0.15	15
0.3	30
0.6	60

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