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Percentage Calculator

What is X% of Y?

Result
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About Percentage Calculator

Five modes cover common percentage questions: a percentage of a value, percentage change, reverse percentage, and adding or subtracting a percentage. The labels beside each field show which number belongs in each part of the formula.

Input

What to prepare

The numbers, dates, units, or assumptions requested in the calculator.

Output

What the result represents

A calculated result based only on the values and options you provide.

Typical use

A practical example

It can help when you need to compare a real-world scenario with a second set of values before making a plan. Start with a representative input, inspect the first result, then adjust one setting at a time if you need a different outcome.

  • Checking everyday figures with Percentage Calculator.
  • Comparing two possible scenarios with Percentage Calculator.
  • Recalculating after one value changes with Percentage Calculator.
Verification

Before you use the result

  • Keep all inputs in the same unit.
  • For percentage change, the starting value is the reference value.
  • Round only the final result when accuracy matters.
Privacy and processing

Enter only the information required for the result. Browser-based work stays on the device where supported, while public checks use protected, rate-limited site endpoints.

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How it works

1. Pick a Mode

Choose from 5 different calculation modes.

2. Enter Values

Fill in the numbers — results update live.

3. See Result

Get the exact percentage answer instantly.

4. Copy Result

One-click copy your result to clipboard.

Frequently Asked Questions

Basic % of a number, % change, X is what % of Y, add %, and subtract %.

Yes — results update live as you type.

Yes, every result has a one-click copy button.

Yes. The calculator can be used without creating a visitor account.