Force Calculator (F = ma)

Calculate force, mass or acceleration with Newton's second law.

Quick answer: Force Calculator (F = ma): Calculate force, mass or acceleration with Newton's second law. Everything runs in your browser, so nothing you enter is uploaded or stored.

Mass (kg)

Acceleration (m/s2)

How to use Force Calculator (F = ma)

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

Formula

F = m x a.

Worked example

A 70 kg person under gravity (9.81 m/s2) pushes down with 686.7 N.

Frequently asked questions

What is the formula?

Force = mass x acceleration.

What unit is force?

Newton (N), equal to 1 kg x m/s2.

Is the Force Calculator (F = ma) free?

Yes. It is free, needs no signup and works on any device.