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Percentage Calculator

Our online percentage calculator Automatically calculates percentage increases or decreases, between two values, provides real-time results, and clearly explains the calculation process with percentage formula.

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Percentage increase / decrease

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Percentage difference

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How to Use the Percentage Calculator?

Understanding Key Calculations:

The Percentage Calculator simplifies the process of calculating percentages in various situations. Whether you’re finding a percentage of a number, calculating what percentage one number is of another, or determining the original value based on a percentage, this tool will help you quickly and accurately complete your calculations. Below are explanations for the primary percentage calculations:

Key Percentage Calculations:

  • What is A% of B? This calculation finds a certain percentage of a given number. The formula is: Formula: Result = (A × B) / 100

    Example: What is 20% of 250?

    • Formula: (20 × 250) / 100 = 50
    • Answer: 20% of 250 is 50.
    • Verification: To verify, calculate 50 as a percentage of 250 using the reverse formula: (50 / 250) × 100 = 20%. This confirms that 50 is 20% of 250.
  • C is what % of B? This calculation finds what percentage C is of B. The formula is: Formula: Percentage = (C / B) × 100

    Example: What percentage of 250 is 50?

    • Formula: (50 / 250) × 100 = 20%
    • Answer: 50 is 20% of 250.
    • Verification: To verify, calculate 20% of 250 using the formula: (20 × 250) / 100 = 50. This confirms that 50 is 20% of 250.
  • D is E% of What? This calculation finds the original number when a value and its percentage are given. The formula is: Formula: Original Value = (D / E) × 100

    Example: 60 is 30% of what number?

    • Formula: (60 / 30) × 100 = 200
    • Answer: 60 is 30% of 200.
    • Verification: To verify, calculate 30% of 200 using the formula: (30 × 200) / 100 = 60. This confirms that 60 is indeed 30% of 200.

How to Use the Percentage Calculator:

  1. Input the Values: Enter the required values in the input fields. For example, for “What is A% of B?”, you would enter the percentage (A) and the number (B) you are calculating the percentage of.
  2. Select the Desired Calculation: Choose the appropriate operation: either “What is A% of B?”, “C is what % of B?”, or “D is E% of What?”.
  3. Instant Results: Click the button to calculate the result, and the percentage will be displayed instantly in the output field.

Examples of How to Use the Percentage Calculator:

Example 1: What is A% of B?

Let’s say you want to find 15% of 120.

  • Enter 120 as the number (B) and 15 as the percentage (A).
  • The calculator will calculate: (15 × 120) / 100 = 18.
  • Result: 15% of 120 is 18.
  • Verification: To verify, calculate 18 as a percentage of 120 using the formula: (18 / 120) × 100 = 15%. This confirms that 18 is indeed 15% of 120.

Example 2: C is What % of B?

You want to find what percentage 30 is of 150.

  • Enter 30 as the value (C) and 150 as the total (B).
  • The calculator will calculate: (30 / 150) × 100 = 20%.
  • Result: 30 is 20% of 150.
  • Verification: To verify, calculate 20% of 150 using the formula: (20 × 150) / 100 = 30. This confirms that 30 is indeed 20% of 150.

Example 3: D is E% of What?

You need to know what number 40 is 50% of.

  • Enter 40 as the value (D) and 50 as the percentage (E).
  • The calculator will calculate: (40 / 50) × 100 = 80.
  • Result: 40 is 50% of 80.
  • Verification: To verify, calculate 50% of 80 using the formula: (50 × 80) / 100 = 40. This confirms that 40 is indeed 50% of 80.

Why Use the Percentage Calculator?

Percentage calculations are essential in many areas, such as finance, shopping, education, and business. Whether you’re calculating discounts, interest rates, or understanding changes in values, our tool helps you do it quickly and accurately.

How it works and how to use it?

The Percentage Calculator is an intuitive tool designed to help you easily calculate percentages in a variety of contexts. Whether you’re determining the percentage of a number, calculating a percentage increase or decrease, or finding the original value based on a percentage, this calculator simplifies the process and provides quick, accurate results.

How It Works:

The calculator allows you to perform three key operations:

  • Calculating the Percentage of a Number: This helps you find what a certain percentage of a number is.

    Formula: Percentage of a number = Number × (Percentage / 100)

  • Calculating Percentage Change: This helps you calculate the difference between two values as a percentage. It’s often used for tracking price changes or growth rates.

    Formula: Percentage Change = ((New Value – Old Value) / Old Value) × 100

  • Finding the Original Value Based on a Percentage: If you know the percentage of a number but want to find the original number, this operation allows you to calculate it.

    Formula: Original Value = Given Value / (Percentage / 100)

How to Use the Percentage Calculator:

  1. Input the Values: Start by entering the required values—either the number, the percentage, or both. You can enter numbers like “50” for a number, and “20” for a percentage.
  2. Select the Desired Calculation: Choose what operation you wish to perform: calculate the percentage, calculate percentage change, or find the original value.
  3. Get Instant Results: Once the values are entered and the operation selected, the calculator will instantly display the result in the desired format (e.g., percentage, percentage change, or original value).

Examples of How to Use the Percentage Calculator:

Example 1: Calculating the Percentage of a Number

Let’s say you want to find 20% of 250.

  • Enter 250 as the number and 20 as the percentage.
  • The calculator will calculate: 250 × (20 / 100) = 50.
  • Result: 20% of 250 is 50.

Example 2: Calculating Percentage Change

You bought an item for $80, and now it’s priced at $100. To calculate the percentage increase:

  • Enter 80 as the old value and 100 as the new value.
  • The calculator will calculate: ((100 - 80) / 80) × 100 = 25%.
  • Result: The price has increased by 25%.

Example 3: Finding the Original Value Based on a Percentage

Suppose you know that 30% of a number is 60, and you need to find the original value.

  • Enter 60 as the given value and 30 as the percentage.
  • The calculator will calculate: 60 / (30 / 100) = 200.
  • Result: The original value is 200.

Why Use the Percentage Calculator?

This tool is not only quick and efficient, but it also eliminates the need for manual calculations or complex formulas. It’s perfect for anyone needing to:

  • Track price changes or discounts while shopping
  • Calculate interest rates or investment returns
  • Determine tax amounts
  • Measure growth or declines in business or personal finances

Whether you’re at home, at work, or on the go, the Percentage Calculator helps you make confident, accurate decisions based on percentages.

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