Aspect Ratio Calculator
Calculate image proportions, simplify aspect ratios, and find missing width or height dimensions instantly.
1. Calculate Ratio from Dimensions
2. Missing Dimension Solver
Enter an aspect ratio and one known dimension. The calculator will determine the missing dimension.
What Is Aspect Ratio?
Aspect ratio describes the proportional relationship between the width and height of an image, video, screen, or other rectangular format.
For example:
1920 ÷ 1080 = 1.777...
Simplified Ratio = 16:9
Common Aspect Ratios
Some commonly used image and video aspect ratios include:
- 1:1 — Square images
- 4:3 — Traditional displays and photography
- 16:9 — Widescreen video and displays
- 3:2 — Common photography format
- 21:9 — Ultrawide displays
How the Missing Dimension Calculator Works
If you know the aspect ratio and one dimension, the calculator can determine the other dimension.
Width = Height × Ratio Width ÷ Ratio Height
Example
For a 16:9 image with a width of 1280 pixels, the corresponding height is 720 pixels.