Friction Calculator

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Calculates the force of static or kinetic friction based on the normal force and coefficient of friction.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Normal Force (N), Coefficient of Static Friction, and Coefficient of Kinetic Friction in the units shown.

Step 2

Read Kinetic Friction Force (N) and Maximum Static Friction Force (N) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Normal Force (N): 100 N; Coefficient of Static Friction: 0.5; Coefficient of Kinetic Friction: 0.3

Kinetic Friction Force (N): 30 N; Maximum Static Friction Force (N): 50 N

Normal Force (N): 50 N; Coefficient of Static Friction: 0.6; Coefficient of Kinetic Friction: 0.4

Kinetic Friction Force (N): 20 N; Maximum Static Friction Force (N): 30 N

Normal Force (N): 200 N; Coefficient of Static Friction: 0.2; Coefficient of Kinetic Friction: 0.15

Kinetic Friction Force (N): 30 N; Maximum Static Friction Force (N): 40 N

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