Aspect Ratio Calculator
Calculate the missing width or height for any aspect ratio like 16:9, 4:3 or 1:1.
About Aspect Ratio Calculator
Build responsive layouts faster with Aspect Ratio Calculator. Adjust the options, preview the result and copy production-ready CSS — free and entirely in your browser.
How to use Aspect Ratio Calculator
- 1Open Aspect Ratio Calculator — it loads instantly and runs entirely in your browser.
- 2Adjust the controls and watch the live preview update in real time.
- 3When it looks right, click Copy to grab the CSS code and paste it into your project.
Why use Aspect Ratio Calculator?
- ✓Modern, responsive CSS without the trial and error
- ✓See the structure update live as you configure
- ✓Copy clean code into any stylesheet
- ✓Free, no sign-up, nothing uploaded
Frequently asked questions
Is the layout responsive?+
Yes. Aspect Ratio Calculator produces modern, standards-based CSS that adapts cleanly across screen sizes when you add your own breakpoints.
Is Aspect Ratio Calculator free to use?+
Yes. Aspect Ratio Calculator is completely free with no sign-up, no watermark and no usage limits. It runs entirely in your browser.
Does Aspect Ratio Calculator upload my data anywhere?+
No. Aspect Ratio Calculator runs 100% client-side — everything happens locally in your browser and nothing is sent to a server, so your work stays private.
Can I use the output in commercial projects?+
Absolutely. Anything you create with Aspect Ratio Calculator is yours to use in personal and commercial projects with no attribution required.
What you can do with Aspect Ratio Calculator
Use Aspect Ratio Calculator to lay out content the right way the first time — galleries, feature grids and dashboards — and copy responsive CSS instead of fighting floats and magic numbers.
How to add Aspect Ratio Calculator to your website
- 1Configure Aspect Ratio Calculator until the live preview looks right, then click Copy to grab the CSS.
- 2Paste it into your stylesheet, or wrap it in a <style> tag inside your HTML <head>.
- 3For inline or React use, drop the properties into a style="…" attribute or a style={{…}} object — or add them to a Tailwind @layer/utility class.
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