DESIGN TOOL
Aspect Ratio Calculator
Calculate a matching width or height for any aspect ratio.
Type a width or height and the other one fills in to match the ratio above.
About this tool
Set a target ratio (like 16:9 for widescreen video, or 4:3, 1:1, 9:16 for vertical video) and this fills in a matching width or height whenever you type the other one. Useful for resizing images, videos, or design mockups without distorting them.
Frequently asked questions
- What are some common ratios?
- 16:9 for widescreen video and most monitors, 4:3 for older TVs and some print, 1:1 for square social posts, and 9:16 for vertical video like stories and reels.
- Does this round the result?
- Yes — dimensions are rounded to the nearest whole pixel, since fractional pixels aren't meaningful for most image and video work.
- Can I use it to check if an existing size matches a ratio?
- Enter your existing width and height into the ratio fields instead — if they simplify to a common ratio like 16:9, that confirms the match.