Resizing by eye is how images end up stretched. The new Aspect Ratio Calculator keeps everything in proportion — find the ratio of any size, then solve a new dimension without distortion.
What it does
- Simplifies any size to its ratio (1920×1080 → 16:9) plus decimal and orientation.
- Resizes safely: enter one new dimension and it solves the other.
- One-click presets: 16:9, 4:3, 1:1, 21:9, 9:16, 3:2.
- CSS-ready: use the
16 / 9value directly in theaspect-ratioproperty.
Why it matters
The aspect ratio fixes an image’s shape; once it’s set, one dimension determines the other. That single idea is what stops faces going wide and circles becoming ellipses. The calculator does the cross-multiplication for you, instantly, in your browser.
Try it
Open the Aspect Ratio Calculator and check your next export. For the full picture — common ratios, the GCD trick, and CSS usage — read Aspect Ratios Explained: 16:9, 4:3, and How Resizing Works.
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Frequently Asked Questions
Can it resize for me?
It solves the missing dimension. Give it the new width and it returns the matching height (or vice versa) so your image keeps its original proportions.
Does it help with CSS?
Yes — the simplified ratio it gives, like 16 / 9, goes straight into the CSS aspect-ratio property.
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