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9:16 Aspect Ratio Calculator
Work with the 9:16 aspect ratio: enter one dimension and get the other keeping 9:16, or check whether a size matches 9:16. For example 1080 × 1920 is a 9:16 size (9:16 means 9 units wide for every 16 tall). The calculator reduces any width×height to its simplest ratio with the greatest common divisor and solves the missing dimension so images and video keep 9:16 without distortion — all in your browser. Common for vertical video, Reels, TikTok and Stories.
9:16 means 9 wide for every 16 tall
- Example 9:16 size: 1080 × 1920
- Reduced via gcd; resize keeps the ratio (no distortion)
Frequently asked questions
What dimensions are 9:16?
Any width×height that reduces to 9:16. For example 1080 × 1920 is 9:16. Enter one dimension in the calculator and it returns the other keeping 9:16.
How do I resize to 9:16?
Set the ratio to 9:16, type your new width (or height), and the calculator computes the matching height (or width) so the image keeps 9:16 without stretching.