Resolution Converter
Pixels to aspect ratio, megapixels and standards.
How to use
- 1 Enter the width and height in pixels.
- 2 Read the aspect ratio, megapixels, orientation and closest standard.
- 3 Enter a target width to rescale while keeping the same ratio.
- 4 Copy the summary for your notes or specs.
About Resolution Converter
The Resolution Converter takes a pixel width and height and tells you everything you usually want to know about that resolution.
It works out the simplified aspect ratio — 1920×1080 becomes a clean 16:9 — along with the decimal ratio, the total pixel count, the megapixel figure and whether the image is landscape, portrait or square.
It also matches your numbers against a table of well-known display standards and reports the closest one, so you instantly see that 3840×2160 is 4K UHD or that 2560×1440 is QHD.
A second panel lets you rescale: type a new target width and the tool computes the matching height that preserves the original aspect ratio exactly, which is handy when you are resizing artwork, exporting thumbnails or planning responsive breakpoints.
Because the maths is done with integer ratios rather than floating-point guesses, the simplified ratios are exact and the rescaled dimensions round predictably to whole pixels.
Everything happens locally in your browser — no dimensions are uploaded or stored — and it keeps working offline once loaded.
It is a quick reference for designers, video editors, game developers and anyone who needs to reason about screen and image sizes without opening a spreadsheet.
FAQ
How is the aspect ratio simplified?
The tool divides the width and height by their greatest common divisor, so 1920×1080 reduces to 16:9 and 1080×1920 reduces to 9:16. The result is exact, not an approximation.
What does the "closest standard" label mean?
Your resolution is compared against common standards by aspect ratio and pixel count. An exact match shows the name directly; a near match is prefixed with a tilde, and anything far from a standard is labelled Custom.
Why might the rescaled height not be a round number?
Preserving the exact ratio can produce a fractional height, so it is rounded to the nearest whole pixel. Pick a target width divisible by the ratio for a clean result.