Percentage Calculator Online – Free & Easy Percent Tool

Free online Percentage Calculator to compute percent values, percentage increase, decrease, and differences instantly and accurately.

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Calculate Percentage

What is X% of Y?

%
50
25% of 200 = 50

Percentage Increase

Increase a number by X%

%
120
100 + 20% = 120
Increase amount: +20

Percentage Decrease

Decrease a number by X%

%
85
100 - 15% = 85
Decrease amount: -15

Percentage Difference

Calculate % difference between two numbers

+50%
From 50 to 75
Difference: +25

Calculation History

1

Choose calculation mode from the four available options.

2

Enter your numbers in the input fields provided.

3

Click Calculate to get instant results with formulas.

4

View detailed breakdown and save to history.

📊 Common Uses

  • Calculate discounts and sales prices
  • Determine tax amounts and totals
  • Analyze business growth rates
  • Compare financial data
  • Track percentage changes over time

💡 Calculation Formulas

Basic: (X / 100) × Y
Increase: Y + (Y × X / 100)
Decrease: Y - (Y × X / 100)
Difference: ((B - A) / A) × 100
1

Choose calculation mode from the four available options.

2

Enter your numbers in the input fields provided.

3

Click Calculate to get instant results with formulas.

4

View detailed breakdown and save to history.

How to Use the Free Percentage Calculator

  1. Choose Mode: Select from Basic %, % Increase, % Decrease, or % Difference.
  2. Enter Your Numbers: Input the values in the provided fields (e.g., "What is 25% of 200").
  3. Calculate: Click the green "Calculate" button to get instant results.
  4. View Breakdown: Review the detailed result along with the specific percentage formula used for the calculation.
  5. Save to History: Your results are automatically saved in the Calculation History for quick reference during your session.

Common Uses for Our Percent Tool

  • Discount Calculator: Quickly determine sales prices and shopping discounts while you browse.
  • Financial Analysis: Analyze business growth rates or compare financial data between different periods.
  • Tax & Totals: Calculate tax amounts, tips, or commissions on the fly.
  • Health Tracking: Use the basic mode as a fat percentage calculator helper to track body composition changes.
  • Educational Support: Perfect for students and teachers to verify complex percentage problems instantly.

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Understanding the Percentage Formula

Our tool simplifies math by applying these standard formulas automatically:

  • Basic Percentage: (X / 100) × Y
  • Percentage Increase: Y + (Y × X / 100)
  • Percentage Decrease: Y - (Y × X / 100)
  • Percentage Difference: ((B - A) / A) × 100

FAQ

1. Is this percentage calculator online free?

Yes, our tool is 100% free to use, requires no registration, and works directly in your web browser.

2. How do I calculate a 20% discount?

Select the % Decrease mode, enter 20 as the percentage, and the original price as your value to see your savings and final price.

3. Can I track my previous calculations?

Yes, the Calculation History feature keeps a record of your recent results so you don't have to re-enter the same numbers twice.