Percentage Calculator

Calculate percentages quickly and accurately

Calculate Percentage

What is X% of Y?

Percentage Increase/Decrease

What is the percentage change from X to Y?

Reverse Percentage

If X is Y%, what is the total (100%)?

How to Use the Percentage Calculator

Basic Percentage Calculation

Use this to find what X% of Y is. For example, "What is 25% of 200?"

  1. Enter the percentage (e.g., 25)
  2. Enter the base number (e.g., 200)
  3. Click "Calculate" to get your result (50)

Percentage Increase/Decrease

Use this to find the percentage change between two numbers. Great for calculating price changes, growth rates, etc.

  1. Enter the original value (e.g., 100)
  2. Enter the new value (e.g., 120)
  3. Click "Calculate Change" to see the percentage increase or decrease (20% increase)

Reverse Percentage

Use this when you know a part and its percentage, and want to find the whole. For example, "If 50 is 25%, what's the total?"

  1. Enter the partial value (e.g., 50)
  2. Enter what percentage it represents (e.g., 25)
  3. Click "Calculate Total" to find the complete value (200)

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Frequently Asked Questions

A: Use the basic percentage calculator. For example, a 20% discount on $100 means 'What is 20% of 100?' The answer is $20, so the final price is $80.
A: Use the basic percentage calculator. For a 15% tip on a $50 bill, enter 'What is 15% of 50?' The result is $7.50.
A: Percentage Increase = ((New Value - Original Value) / Original Value) × 100
A: Yes! The percentage increase/decrease calculator shows negative percentages as decreases. For example, going from 100 to 80 shows a 20% decrease.
A: All calculations are rounded to 2 decimal places for readability, but the underlying calculations are highly accurate.