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Force, mass and acceleration calculator
Newton's second law (F = ma): find the force, the mass or the acceleration, with the weight on Earth.
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About Force, mass and acceleration calculator
Newton's second law says force equals mass times acceleration (F = m x a). Enter two values to get the third, in newtons, kilograms and metres per second squared. It also shows the weight on Earth, using gravity of about 9.81 m/s2, which is a force, not a mass.
How to use Force, mass and acceleration calculator
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
Is weight the same as mass?
No. Mass is the amount of matter, in kilograms. Weight is the force of gravity on that mass, in newtons, roughly mass x 9.81 on Earth.
Is Force, mass and acceleration calculator free?
Yes. Force, mass and acceleration calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.