Screen Ratio Calculator
Calculate screen aspect ratio from width and height, simplify to the nearest common standard like 16:9 or 4:3, and view the decimal ratio.
What Is Screen Aspect Ratio?
Aspect ratio is the proportional relationship between screen width and height. A 1920×1080 display has a 16:9 ratio because 1920 ÷ 1080 = 1.777...
How to Calculate Aspect Ratio
Divide width by height to get the decimal ratio, then simplify by finding the greatest common divisor (GCD). For example, 2560×1440 simplifies to 16:9.
Common standards include 16:9 (widescreen), 4:3 (classic monitors), 21:9 (ultrawide), and 9:16 (vertical video). This tool matches your dimensions to the nearest standard ratio.
Frequently Asked Questions
Is 1920×1080 the same as 16:9?
Yes. 1920 divided by 1080 equals 16/9, the standard widescreen ratio used by most TVs and monitors.
What is the difference between aspect ratio and resolution?
Resolution is the pixel count (e.g. 1920×1080). Aspect ratio is the shape (16:9). Two screens can share a ratio but have different resolutions.
Why does my ratio not match a standard exactly?
Manufacturers sometimes use slightly non-standard pixel counts. The closest-match feature shows which standard ratio your screen most closely resembles.
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