Calculators
Friction Force Calculator
Solve for friction force, coefficient of friction, or normal force using consistent units locally in your browser.
Choose what to solve for, then enter the other two values using consistent force units (for example, newtons with newtons for newtons; the coefficient is dimensionless). Calculations run locally in your browser; your values are not uploaded or stored.
Solve friction force equals coefficient times normal force without uploading your values.
Enter the coefficient with normal force, friction force with normal force, or friction force with coefficient using consistent force units, such as newtons with newtons for newtons. The calculator applies friction force = coefficient × normal force and shows the matching result locally without being uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
Which formulas does the friction force calculator use?
It uses friction force = coefficient x normal force, coefficient = friction force / normal force, and normal force = friction force / coefficient. For example, a coefficient of 0.4 with a normal force of 100 force units gives a friction force of 40 force units.
Which units should I use?
Use the same force units on both inputs, such as newtons with newtons for newtons. The coefficient of friction is dimensionless, so the answer is reported in the matching force unit.
Which inputs are accepted?
Enter a coefficient between 0 and 10 and forces of zero or greater up to 1,000,000,000,000. Normal force must be greater than zero when solving for the coefficient, and the coefficient must be greater than zero when solving for the normal force. Missing or non-numeric entries show a clear error instead of a result.
Do my values stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.