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Percentage Calculator

Math

Free percentage calculator for part-to-whole percents, percentage change, discounts, tips, and markup - each in its own clear mode.

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Percentage Calculator
Result

Enter values or use Example to calculate.

Five modes: part-to-whole percent, percentage change, discount, tip (with split), and markup. Shows the arithmetic for the active mode only - not a full spreadsheet.

See more about the Percentage Calculator

Examples

What is 15% of 80?

Mode: Percentage · 15% of 80 → 12 (0.15 × 80)

Switch modes with the tabs. Only the active mode’s inputs are used.

Tip split three ways

Mode: Tip · bill + 18% tip · 3 people → tip total and per-person share

Tip presets are shortcuts; you can type a custom tip percent. Markup and discount are separate modes.

Key features

  • Five calculation modes
  • Formula shown with the result
  • Runs locally in the browser

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Quick answers for Percentage Calculator

Which percentage problems can it solve?
Five modes: find a percentage of a number, percentage change between two values, discount price, tip with optional split, and markup from cost.
Does it show the formula?
Yes. The active mode shows the arithmetic next to the result so you can check the steps.
Does my data leave the browser?
No. Calculations run locally. For converting units instead of percents, use Unit Converter.