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Aspect Ratio from Dimensions (W×H → ratio)
Find the aspect ratio of any width × height. The calculator divides both by their greatest common divisor to reduce the size to its simplest ratio — so 1920 × 1080 becomes 16:9, 3000 × 2000 becomes 3:2, and 1080 × 1920 becomes 9:16. It also shows the decimal ratio (width ÷ height). Useful for identifying a screen, photo or video format. Computed entirely in your browser.
Quick answer
1920 × 1080 → 16:9 (gcd 120)
- 3000 × 2000 → 3:2, 1080 × 1920 → 9:16
- Also shows the decimal ratio (w ÷ h)
Frequently asked questions
What aspect ratio is 1920×1080?
16:9. Dividing both by their greatest common divisor (120) gives 16:9 — the standard widescreen/HD ratio.
How do I find the aspect ratio of an image?
Divide the width and height by their greatest common divisor. Enter the dimensions and the calculator returns the reduced ratio (e.g. 3000 × 2000 → 3:2) and the decimal.