Developer Utilities · Free tool
Aspect Ratio Calculator
Keep images and video in proportion — enter width or height, get the matching dimension for any aspect ratio.
Updated June 2026
Preset ratios
1.778:1
Results
- Aspect ratio
- 16:9
- Decimal
- 1.7778
- GCD
- 120
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What it does
Keep images and video in proportion. Enter a width or height for a given aspect ratio (16:9, 4:3, 1:1, 2.35:1) and the tool fills in the matching dimension. Also reverses: paste width and height and get the simplified ratio and closest standard.
Pair with image resizer, image dimensions checker, and social media image sizes.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/aspect-ratio-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Aspect Ratio Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Pick or type an aspect ratio.
- Enter width — height fills in (or vice versa).
- Reverse mode: paste width and height, see the ratio.
- Copy the dimensions for your editor.
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Learn more
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