Percentage Calculator
Calculate percentages, discounts and changes
About Percentage Calculator
How Percentage Calculator Works
Fill in values and percentages, increases, decreases, and tips are computed in your browser. All math runs client-side, so your figures never leave the device.
The Percentage Calculator answers common percentage questions: what percent one number is of another, percentage increase or decrease, and applying a percent to a value, plus a tip helper. A typical use case is calculating a discount at checkout, figuring out a grade, or splitting a restaurant bill with a tip. All math runs locally, so your figures are never uploaded. It removes mental arithmetic errors and explains the result clearly, which is useful for shopping, budgeting, and studying. The multiple modes mean you do not have to rearrange formulas yourself; you just fill in the blanks and read the answer.
Frequently asked questions
What can it calculate?+
Percent of a number, change between values, and tips, among other modes.
Is my data uploaded?+
No. Calculation happens entirely in your browser.
Can it handle decreases too?+
Yes. It computes both percentage increase and decrease.
Limitations
It solves standard percentage problems and does not model compound interest or multi-step financial scenarios.