Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find dimensions from a given ratio.
Common Ratios
Resolution Presets
| Resolution | Dimensions | Ratio |
|---|---|---|
| 720p (HD) | 1280 x 720 | 16:9 |
| 1080p (Full HD) | 1920 x 1080 | 16:9 |
| 1440p (QHD) | 2560 x 1440 | 16:9 |
| 4K (UHD) | 3840 x 2160 | 16:9 |
Result
Simplified Ratio16:9
Decimal Ratio1.7778
Original Dimensions1920 x 1080
Ratio Preview
What is Aspect Ratio?
An aspect ratio describes the proportional relationship between the width and height of a display or image. For example, 16:9 means the width is about 1.78 times the height, and is the standard for most monitors and TVs. 4:3 is common in older monitors and iPads, while 1:1 (square) is popular for social media posts.
Calculation Examples
FAQ
What is the most common aspect ratio?
16:9 is the most common aspect ratio, used by most monitors, TVs, and smartphones. Other popular ratios include 4:3 (classic TV), 21:9 (ultrawide), and 1:1 (social media).
How do you calculate an aspect ratio?
Find the Greatest Common Divisor (GCD) of the width and height, then divide both by the GCD. For example: 1920x1080 → GCD is 120 → 16:9.
How do I find dimensions from a ratio?
If you know one dimension and the ratio, calculate the other. For example: 16:9 ratio with width 1280 → height = 1280 × (9/16) = 720.