Force Calculator (F = ma)
Solve force, mass, or acceleration with F = m·a.
Leave the value you want to find as 0.
The link between force and motion
Newton’s second law, F = ma, is the equation that connects force, mass, and acceleration. Know any two and the third follows — the foundation of classical mechanics.
A 10 kg object accelerating at 2 m/s² needs 20 newtons of force. Set the quantity you want to zero and the calculator solves for it from the other two, so it works in every direction.
Flexible and private
It rearranges F = ma in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is Newton’s second law?
Force equals mass times acceleration. It links how hard you push to how much something accelerates.
Can it solve for mass or acceleration?
Yes. Leave one field blank or set it to zero and it solves for that quantity from the other two.
What units are used?
Mass in kilograms and acceleration in metres per second squared give force in newtons.
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