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Gear ratio calculator
Gear ratio, output speed and torque from the teeth of the gears.
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- Works on any device
About Gear ratio calculator
Enter the teeth on the driving and driven gears to get the gear ratio, then see the output speed and torque. Ratio equals driven teeth divided by driving teeth. A ratio above 1 reduces speed and multiplies torque by about the same amount, minus friction losses.
How to use Gear ratio 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
Does a bigger gear ratio give more torque?
Yes, a higher reduction ratio raises output torque and lowers speed by the same factor. Power stays the same, apart from losses to friction.
Is Gear ratio calculator free?
Yes. Gear ratio 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.