Percentage Calculator

Solve all the common percentage questions.

Instant · runs in your browser
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About the Percentage Calculator

One page for all common percentage questions, each with its own box and formula:

  • What is X% of Y? (15% of 2,400 = 360)
  • X is what percent of Y? (45 of 60 = 75%)
  • Percentage increase or decrease between two numbers
  • Add or subtract a percentage from a number

Tip

To find X% of Y, multiply Y by X and divide by 100; the calculator shows this working for every answer.

How to use Percentage Calculator

  1. Enter your values. Units and defaults are shown beside each field.
  2. Press Calculate (results also update as you type once calculated).
  3. Read the result and the step-by-step breakdown with the formula used.
  4. Copy the result or reset to start again.

Frequently asked questions

How accurate is this calculator?

Calculations use the standard formulas shown on the page, computed in full precision and rounded only for display. The result is only as accurate as the inputs and assumptions listed.

Is it free?

Yes. All tools are free to use without an account.