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Find the simplified aspect ratio from any dimensions, or resize by a target ratio. Instant results, no signup.
| Ratio | Decimal | Common Uses |
|---|---|---|
| 1:1 | 1.00 | Instagram square, profile photos, icons |
| 4:3 | 1.33 | Classic TV, iPad, older monitors, PowerPoint |
| 3:2 | 1.50 | DSLR photos, MacBook displays, 35mm film |
| 16:9 | 1.78 | YouTube, HD/4K TV, most monitors, presentations |
| 16:10 | 1.60 | MacBook Pro, some laptops, WXGA displays |
| 21:9 | 2.33 | Ultrawide monitors, cinematic video, film |
| 9:16 | 0.56 | TikTok, Instagram Reels, YouTube Shorts, Stories |
Calculate aspect ratios instantly — no signup, no ads cluttering the result. Enter any width and height to get the simplified ratio, or lock a ratio and resize dimensions proportionally. Perfect for designers, video editors, web developers, and anyone working with images, screens, or video. Common ratios like 16:9, 4:3, 1:1, and 9:16 are one click away.
Enter the width and height in pixels. The calculator instantly shows the simplified ratio. For example, 1920 x 1080 simplifies to 16:9, and 1080 x 1080 simplifies to 1:1.
16:9 is the most common aspect ratio for screens, YouTube videos, and HD/4K displays. Other popular ratios include 1:1 (Instagram square), 4:3 (classic TV), 9:16 (mobile/TikTok/Reels), and 21:9 (ultrawide cinema).
Use the Lock Ratio mode. Select or enter your desired aspect ratio, then type either a new width or height. The calculator automatically computes the other dimension to maintain the exact ratio.
1920 x 1080 has an aspect ratio of 16:9. This is the standard Full HD resolution used by most monitors, TVs, and YouTube videos.