Force Calculator
Calculate force from mass and acceleration using Newton's second law.
Force, mass and acceleration
Newton's second law states that force equals mass times acceleration — the heavier something is and the faster you change its motion, the more force is involved. This calculates any of the three from the other two, the cornerstone relationship of mechanics for physics study and engineering.
Enter two of force, mass and acceleration to get the third.
What it explains
This one relationship underlies a huge amount of everyday physics: why a heavier object takes more force to get moving or to stop, why the same push accelerates a light object more than a heavy one, and why crumple zones and airbags work by extending the time of a collision to reduce the force. Weight itself is just this law applied to gravity's acceleration.
Questions & answers
What is Newton's second law?
Force equals mass times acceleration — the relationship between how heavy something is, how fast its motion changes, and the force involved.
What does it explain in everyday life?
Why heavier objects need more force to move or stop, and why airbags and crumple zones reduce injury by extending a collision's time.
Is anything uploaded?
No. The calculation happens in your browser.