Aspect Ratio Calculator
Easily find the proportional relationship between width and height. Use this tool to identify the ratio of a screen resolution or to scale an image to a new size without distortion.
What is aspect ratio?
Aspect ratio is the proportional relationship between the width and height of an image or screen. It is usually expressed as two numbers separated by a colon, such as 16:9.
How do I calculate aspect ratio from resolution?
Divide both the width and height by their greatest common factor (GCF). For example, a 1920x1080 resolution has a GCF of 120. 1920/120 = 16 and 1080/120 = 9, resulting in a 16:9 ratio.
What are common aspect ratios?
Common ratios include 16:9 (Widescreen TV), 4:3 (Traditional TV), 3:2 (Photography), and 21:9 (Ultrawide monitors).
How do I resize an image while keeping the ratio?
Use the "Resize" mode in this calculator. Enter your original width and height, then enter either the new width or new height. The tool will calculate the missing value to ensure the proportions remain identical.