About the Force Calculator
Solve for force, mass, or acceleration using Newton's second law, F = ma.
What it is
Newton's second law relates force, mass, and acceleration: F = ma. Enter any two known values and this tool solves for the third automatically. A net-force mode extends this to problems where several forces act on an object along one axis โ sum them, then solve for the resulting acceleration.
Features
Solve for F, m, or a
Enter any two known quantities to solve for the third.
Unit conversion
Mix newtons/pounds-force, kilograms/pounds, and m/sยฒ/ft/sยฒ/g-force freely.
Net-force summation mode
Add multiple signed forces along one axis before solving for acceleration.
Step-by-step working
Every result shows the formula and substitution with your actual values.