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 April 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.
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.