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Percentage Calculator

About Percentage Calculator

Percentage Calculator is a small, focused utility site: one main tool, done well, plus two closely related tools. The main tool covers five calculations: what X% of Y is, what percent X is of Y, percentage increase, percentage decrease, and percentage difference. Each result shows its formula and step-by-step working, so you can check it rather than just trust it.

What you get here

  • Instant results — enter two numbers and the answer updates as you type.
  • Formulas and steps in plain text, not images, so they work with screen readers and copy cleanly.
  • Decimal commas as well as dots: 12,5 works the same as 12.5.
  • Clear division-by-zero explanations instead of a misleading number.
  • Private by design — no sign-up, and nothing you enter leaves your browser.
  • Fast on mobile — a clean, simple layout that works well on a phone.

What it is not

This site does not give financial advice or store the numbers you enter. Results are for general information only and are rounded to two decimal places. See the Privacy Policy for how little data this site handles — by design, almost none.

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