Good to know
Simple first.
Enter a new width in the tool to get the matching height.
Free · No sign-up · PrivatePresentation & Layout
Proportion Calculator.
Scale one dimension while keeping the same proportion.
1 Enter2 Adjust3 Use result
Input
Answer
16:9
1920 × 1080
Enter a new width in the tool to get the matching height.
Private by design
Files stay with you.
The actual file processing happens in your browser. A small number of advanced tools may load a browser helper library, but OutMonkey does not upload your file to do the job.
How file handling works →Before you finish
A quick check makes a better result.
OutMonkey is built to be simple enough for someone doing this once and useful enough for someone who does it every day.
What this tool is for
Proportion calculator
Scale one dimension while preserving proportion. The aim is a useful result without making you learn a full piece of software first.
Good to know
Judge it at presentation size.
Step back from the screen or view the slide full-screen. A layout that looks fine while editing can feel crowded when it is projected or viewed from a distance.
If the result is for someone else, open it once as they would see it. That simple check catches a surprising number of tiny mistakes.
In plain English
You do not need to be an expert.
Grids and spacing rules help organise a page, but they are not laws. If something looks obviously off, adjust it rather than forcing the layout to obey a number.
A grid is a starting structure, not a reason to ignore optical balance.