Percentage Calculator

Free online tool — no sign-up required

Calculate percentages instantly with our free online percentage calculator. Find percentage of a number, percentage increase/decrease, percentage difference, and more. Essential for students, shoppers, business professionals, and anyone who works with numbers. Simple interface with instant results.

This tool is interactive — turn on JavaScript to use it.

How to Use Percentage Calculator

  1. Choose calculation type — Select from basic percentage, increase/decrease, difference, or ratio.
  2. Enter your numbers — Input the values you need to calculate.
  3. Get instant results — See the answer immediately with the formula shown.
  4. View step-by-step — Understand the math with our step-by-step breakdown.
  5. Save or share — Copy the result or share the calculation via link.

Percentage Calculator — Frequently Asked Questions

What percentage calculations are supported?

Basic percentage, percentage of a number, percentage increase/decrease, percentage change, ratio to percentage, and fraction to percentage.

Can I do reverse percentage?

Yes, you can find the original number before a percentage increase or decrease was applied.

Is it useful for shopping?

Absolutely! Calculate sale prices, discounts, tax amounts, and tips instantly.

Can I use it for grade calculations?

Yes, enter your score and total to calculate your percentage grade instantly.

Does it show the formula?

Yes, every calculation includes the formula used and a step-by-step explanation.

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