Dokuntag Publish Tools

Aspect Ratio Calculator

Find an image aspect ratio and calculate a proportional target height for a new width.

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Find an image aspect ratio and calculate the matching height for a new width while preserving the same proportions.

Width (px)Height (px)Target width (px)

Aspect ratio

4:5

Orientation

Portrait

Proportional target height

1,350.00 px

Target height = target width ÷ (width ÷ height)

Common aspect ratios

1:1 — square

4:5 — common portrait image

16:9 — widescreen video

9:16 — vertical short video

DOKUNTAG App

After calculating the aspect ratio, use Image Tools DOKUNTAG to resize by px, mm, or cm, reduce to a target KB/MB size, or convert JPG/PNG/WebP.