Percentage Calculator
Calculate percentages quickly with three common formulas.
About the Percentage Calculator
Calculate percentages with three common formulas. Find percentages, percentage of a number, and percentage change.
Why client-side?
Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.
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Frequently Asked Questions
- How do I calculate a percentage of a number?
- Enter the percentage and the number. For example, to find 15% of 200, enter 15 and 200 to get 30.
- How do I calculate percentage change?
- Enter the original value and the new value. The tool calculates the percentage increase or decrease between the two numbers.
- What percentage formulas are available?
- The tool supports three common calculations: what is X% of Y, X is what % of Y, and percentage change from X to Y.