Design & Media Utility
Aspect Ratio Calculator
Calculate image and video aspect ratios, scale dimensions proportionally, and find screen sizes instantly.
Proportional Dimension Resizer
Detected Aspect Ratio16 : 9
Calculated New Height
720 px
Common Screen & Media Presets
HD Video / Widescreen1920 x 1080
16:9Standard Computer Monitor1920 x 1200
16:10Classic Television / Photo1024 x 768
4:3Instagram / Square Post1080 x 1080
1:1Vertical Story / Reels / TikTok1080 x 1920
9:16Cinematic Widescreen2560 x 1080
21:9How to use the Aspect Ratio Calculator
- Enter your media item's original width and height in pixels to automatically compute its aspect ratio.
- Type a new target width in the scaling box to calculate the proportional new height instantly.
- Click any common preset card on the right to load standard video, photo, or monitor dimensions.
What is an Aspect Ratio?
An aspect ratio is the proportional relationship between an image's width and its height, expressed as two numbers separated by a colon (e.g., 16:9). Maintaining correct aspect ratios prevents image distortion and stretching across web layouts.
Frequently asked questions
What is the most common video aspect ratio?
16:9 is the universal standard for YouTube, HDTVs, web videos, and computer displays.
How do I calculate height if I know the width and ratio?
Multiply the target width by the height ratio number, then divide by the width ratio number.
Is my dimension data sent to a server?
No, all calculations run 100% locally inside your web browser.