What is an aspect ratio calculator?
An aspect ratio calculator finds the proportional relationship between width and height. It can simplify a size like 1920 x 1080 to 16:9 or calculate a missing width or height.
Free Aspect Ratio Calculator
Calculate image and video ratios fast.
An aspect ratio calculator finds the proportional relationship between width and height. Use it to calculate a missing image size, simplify dimensions like 1920 x 1080, or convert a decimal ratio into a clean width-to-height pair.
Calculated height
720 px
1,280 px wide at 16:9 is 720 px tall.
1,280 / 16 x 9 = 720
16:9
Aspect ratio questions
How do I calculate height from width and aspect ratio?
Divide the width by the first ratio number, then multiply by the second ratio number. For 16:9 at 1280 pixels wide, the height is 1280 / 16 x 9 = 720.
How do I calculate width from height and aspect ratio?
Divide the height by the second ratio number, then multiply by the first ratio number. For 9:16 at 1920 pixels tall, the width is 1920 / 16 x 9 = 1080.
What aspect ratio is 1920 x 1080?
1920 x 1080 simplifies to 16:9, which is the most common widescreen ratio for video, slides, and web embeds.
What aspect ratio should I use for vertical video?
Use 9:16 for vertical video. Common sizes include 1080 x 1920, 720 x 1280, and 1440 x 2560.