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Force Calculator
Apply Newton's second law to find force, mass or acceleration, plus the speed and distance a body reaches.
Force calculator
Result: —
Speed reached: —
Distance travelled: —
How to use the Force Calculator
- Choose whether to solve for force, mass or acceleration.
- Enter the two known values, and a time if you want speed and distance.
- Read the result together with the speed and distance travelled.
Features
- Solves for force, mass or acceleration
- Speed and distance from a given time
- Uses Newton's second law F = m x a
- Runs locally, no uploads
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Frequently Asked Questions
Common questions about the free online force calculator.
Enter the mass in kilograms and the acceleration in metres per second squared and the
calculator multiplies them to give force in newtons.
It states that force equals mass times acceleration, written as F = m x a, and it links force
to how quickly velocity changes.
The force is 20 newtons, because 10 kilograms multiplied by 2 metres per second squared
equals 20 newtons.
Switch the solve mode to mass and enter the force and the acceleration. The calculator
divides force by acceleration to give kilograms.
Switch the solve mode to acceleration and enter the force and the mass. The calculator
divides force by mass to give metres per second squared.
Speed equals acceleration multiplied by time when the body starts from rest, so 2 m/s2 for 3
seconds gives a speed of 6 m/s.
For motion from rest the distance is half the acceleration multiplied by the square of the
time, written as s = 0.5 x a x t x t.
One newton is the force needed to accelerate a mass of one kilogram at one metre per second
squared, roughly the weight of a small apple.
No. All force calculations run locally in your browser, so nothing you type is sent anywhere
or stored on a server.
Yes. It is completely free and unlimited, with no account, no sign-up and no cap on how many
calculations you run.
Last updated: October 10, 2026