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Ratio calculator
Simplify a ratio, see each side's share, and scale it to a new size.
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- No sign-up
- Works on any device
About Ratio calculator
Reduce a ratio to its simplest form, see each side as a share of the whole and scale it up or down. A ratio of 16:9 stays 16:9 at any size, so it is also handy for screen sizes. Dividing both terms by their GCD gives the simplified version.
How to use Ratio calculator
- Enter the two parts of your ratio, for example 24 and 36.
- Read the simplified ratio and each side's share as a percentage.
- Enter a new size for one side to scale the ratio.
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.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
How do I simplify the ratio 24:36?
Divide both numbers by their greatest common divisor, 12. That leaves 2:3. As shares, that is 40 percent and 60 percent of the total.
How do I compare ratios with different units?
Convert both sides to the same unit first. A ratio of 2 hours to 30 minutes should be entered as 120 to 30, which simplifies to 4 to 1.
Can I use this for aspect ratios?
Yes. Enter the width and height to get the simplified ratio, such as 16 to 9, then give one new side to find the other when resizing.
Is Ratio calculator free?
Yes. 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.
Can I put Ratio calculator on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.