Percentage Calculator
Calculate `X% of Y`, `X is what % of Y`, and `% change from X to Y` with three dedicated modes. Great for finance, discounts, and quick math.
Runs locally in your browser
%
of
Result
45
18 / 100 × 250 = 45
Percent
18%
Whole
250
Part
45
Remaining
205
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About Percentage Calculator
Calculate `X% of Y`, `X is what % of Y`, and `% change from X to Y` with three dedicated modes. Great for finance, discounts, and quick math.
Percentage Calculator is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.
Frequently asked questions
`(new - old) / old * 100`. Positive means increase, negative means decrease.