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Percentage Calculator

Find a percentage, a share or a percentage change.

Local processing

Set up your calculation

Negative numbers and decimals are accepted. Results use up to 6 decimal places.

Your result

50

25% of 200 = 50

Calculated in your browser. No sign-up needed.

Your inputs stay on this device. No account or file upload needed.

A QUICK GUIDE

How to use percentage calculator

Choose the calculation that matches your question. The result includes the calculation so you can see where the percentage comes from.

  1. Select percentage of a number, percentage share or percentage change.
  2. Enter both values, using a decimal point for fractions.
  3. Read the result and calculation, or copy the answer.
TRY THIS EXAMPLE

Three common percentage questions

25% of 200 is 50. A value of 50 is 25% of 200. A change from 80 to 100 is a 25% increase: (100 − 80) ÷ 80 × 100.

Good to know

  • A percentage share cannot use a zero denominator.
  • Percentage change uses a positive starting value. An increase is positive and a decrease is negative.
  • Displayed values are rounded to at most six decimal places. This is a general calculation aid, not an accounting or financial forecasting service.

Common questions

Are percentage change and percentage points the same?

No. A change from 20% to 25% is 5 percentage points. Relative to the starting value of 20, it is a 25% increase.

Why can’t I calculate growth from zero?

The percentage change formula divides by the starting value. Division by zero does not produce a finite percentage, so the tool asks you to choose a positive starting value.