Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find missing dimensions from a ratio
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Calculate Aspect Ratio
x
16:9
Decimal: 1.7778
1920 x 1080
Calculate Missing Dimension
:
Common Aspect Ratios
Frequently Asked Questions
What is the aspect ratio of 1920x1080?
1920x1080 has an aspect ratio of 16:9, which is the standard widescreen format used for HD and 4K displays, YouTube videos, and most modern monitors.
What aspect ratio is best for Instagram?
Instagram supports 1:1 (square) for feed posts, 4:5 (portrait) for maximum feed visibility, and 9:16 (vertical) for Stories and Reels.
How do I calculate aspect ratio from pixel dimensions?
Divide both the width and height by their greatest common divisor (GCD). For example, 1920/120 = 16 and 1080/120 = 9, giving a 16:9 ratio.