Percentage Calculator
Calculate percentages, increases and decreases.
CalculatorsRatio Calculator
Simplify integer ratios or calculate a missing proportional value.
In-browser processing No account needed Review before using
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About Ratio Calculator
Simplify integer ratios or calculate a missing proportional value. This workspace gives you an immediate, inspectable result without creating an account. Inputs are not uploaded by the tool, and original files on your device are not overwritten.
Before you use the result
This is an informational calculation, not financial, medical or professional advice. Check the units, assumptions and rounding. Interest calculators do not include unentered fees, taxes or changing rates.
Do I need to install software?
No desktop application is required. Open this page in a current browser with JavaScript enabled. PDF, OCR and Markdown features load an additional engine on demand; an internet connection may be needed the first time.
Are my files saved on the website?
The application does not upload or store your file contents. Results stay in this browser until you download or copy them. The server still receives normal page requests; see our privacy page for the distinction.
What should I do if a result looks wrong?
Check your input, units and options, then try a smaller example. Keep the original file and review important results manually. Browser format support and memory limits can affect file tools.
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