INTERACTIVE TOOL
Percentage calculator
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How to use this tool
- Choose percentage of an amount or percentage represented.
- For an amount, enter a percentage and its base.
- For a proportion, enter a part and a nonzero total.
Formula or method usedPart = total × percentage ÷ 100. Percentage = part ÷ total × 100.
Worked example
Twenty percent of 250 is 50. A part of 50 out of 250 represents twenty percent.
Assumptions and limits
Always identify the base amount before comparing percentages.
Frequently asked questions
Can I use decimal values?+
Yes. Decimal inputs are supported and results keep a practical level of precision.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
Always identify the base amount before comparing percentages.