What is the Aspect Ratio Calculator?
Aspect ratio is the shape of an image or screen – width compared to height. Enter a width and height to get the simplified ratio, or pick a ratio and type one side to get the other. Useful for YouTube (16:9), Reels/Shorts/TikTok (9:16), Instagram (1:1, 4:5) and printing.
How to use the Aspect Ratio Calculator
- Enter width and height to find the ratio, or
- Choose a ratio and enter a new width (or height) to get the matching size.
Common ratios
- 16:9 – 1920×1080, 1280×720, 3840×2160
- 9:16 – 1080×1920 (Reels, Shorts, TikTok)
- 4:3 – 1024×768, 1600×1200
- 1:1 – 1080×1080
- 4:5 – 1080×1350 (Instagram portrait)
- 21:9 – 2560×1080 (ultrawide)
This Aspect Ratio Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech