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Percent Change

Percentage Change Calculator

Enter start value and end value to calculate % change

Start Value
End Value

Value After Percentage Change

Enter start value and percentage change to calculate end value

e.g. 100 after 5% increase = 105

Start Value
After %


The percent change, also known as the percentage change or relative change, is a measure of how much a quantity has changed in percentage terms. It is commonly used in various fields, including finance, economics, and mathematics. The formula for calculating percent change is as follows:

Percent Change=(Final ValueInitial ValueInitial Value)×100\text{Percent Change} = \left( \frac{\text{Final Value} - \text{Initial Value}}{\left| \text{Initial Value} \right|} \right) \times 100

Here's a step-by-step explanation of each part of the formula:

  1. Difference between Final and Initial Values:

    • Subtract the initial value from the final value. This represents the absolute change in the quantity.

      Absolute Change=Final ValueInitial Value\text{Absolute Change} = \text{Final Value} - \text{Initial Value}

  2. Relative Change:

    • Divide the absolute change by the absolute value of the initial value. This normalizes the change with respect to the initial value.

      Relative Change=Absolute ChangeInitial Value\text{Relative Change} = \frac{\text{Absolute Change}}{\left| \text{Initial Value} \right|}

  3. Convert to Percentage:

    • Multiply the relative change by 100 to express the result as a percentage.

      Percent Change=Relative Change×100\text{Percent Change} = \text{Relative Change} \times 100

By following these steps, you can determine the percentage change between two values. The result will be positive if there is an increase and negative if there is a decrease. This formula allows for a standardized way to quantify the magnitude of change, making it useful for comparing changes across different scenarios and contexts.

Let's go through a quick example:

  • Initial Value: $50
  • Final Value: $75

Absolute Change=7550=25\text{Absolute Change} = 75 - 50 = 25

Relative Change=2550=2550=0.5\text{Relative Change} = \frac{25}{\left| 50 \right|} = \frac{25}{50} = 0.5

Percent Change=0.5×100=50%\text{Percent Change} = 0.5 \times 100 = 50\%

So, in this example, there is a 50% increase from $50 to $75.


Find the answers for the most frequently asked questions below

What is a percentage change calculator?

A percentage change calculator is a tool that helps you determine the percentage difference between two values. It is commonly used to calculate the increase or decrease between an initial value and a final value.

How do I use the percentage change calculator?

Using our calculator is straightforward. Enter the initial value in the "Start Value" input box and the final value in the "End Value" input box. Click the "Calculate" button, and the tool will display the percentage change between the two values.

What formula does the calculator use to calculate percentage change?

The formula for percentage change is:

Percentage Change=(Final ValueInitial ValueInitial Value)×100\text{Percentage Change} = \left( \frac{\text{Final Value} - \text{Initial Value}}{\left| \text{Initial Value} \right|} \right) \times 100

The result is expressed as a percentage.

Can I use the calculator for both positive and negative changes?

Yes, the calculator handles both positive and negative changes. The result will be positive for an increase and negative for a decrease.

What should I do if I get an error message?

If you receive an error message, make sure you have entered valid numerical values in both the "Start Value" and "End Value" input boxes. Ensure there are no typos or non-numeric characters.

Is the calculator free to use?

Yes, the age calculators are freely accessible online tools. There is no cost associated with using them.

Applicatons of Percentage Change

  1. Financial Analysis:

    • Calculate the percentage change in stock prices, investment returns, or financial indicators over specific periods.
  2. Business and Economics:

    • Analyze changes in sales figures, revenue, expenses, or other financial metrics for business planning and decision-making.
  3. Education:

    • Assist students in math classes by providing a tool for calculating percentage changes in various scenarios.
  4. Data Analysis:

    • Evaluate changes in data sets, such as population growth, temperature variations, or any other numerical data.
  5. Scientific Research:

    • Analyze experimental results or changes in scientific data over time.
  6. Real Estate:

    • Calculate the percentage change in property values or rental prices.
  7. Healthcare:

    • Analyze changes in health metrics, medication dosages, or patient outcomes.
  8. Marketing and Sales:

    • Evaluate changes in conversion rates, customer acquisition costs, or marketing campaign performance.
  9. Comparing Prices:

    • Compare price changes of products or services over different time periods.
  10. Quality Control:

    • Assess changes in defect rates or product quality over time.


Welcome to PercentChange.net, your go-to destination for accurate and easy-to-use percentage change calculations! At PercentChange.net, we understand the importance of quickly and precisely determining the percentage difference between two values. Whether you're a student working on math homework, a business professional analyzing financial data, or anyone in need of a reliable percentage change calculator, we've got you covered.

Our Mission

Our mission at PercentChange.net is to provide users with a user-friendly and efficient tool for calculating percentage changes. We aim to empower individuals, students, and professionals alike by offering a reliable platform that simplifies complex mathematical calculations.

What Sets Us Apart

  • Ease of Use: Our calculator is designed with simplicity in mind. With just a few clicks, you can effortlessly calculate the percentage change between two values.

  • Accuracy: We prioritize accuracy in our calculations to ensure that you can trust the results provided by our tool for your academic, professional, or personal needs.

  • Versatility: Whether you're dealing with positive or negative changes, large or small values, our calculator can handle a wide range of scenarios.

How It Works

Using PercentChange.net is straightforward. Enter the initial value in the "Initial Value" input box and the final value in the "Final Value" input box. Click the "Calculate" button, and instantly receive the percentage change result.

Contact Us

We value your feedback and are dedicated to continuously improving our services. If you have any questions, suggestions, or inquiries, please don't hesitate to reach out to us through our contact page. Your input is crucial in helping us enhance your experience with PercentChange.net.

Thank you for choosing PercentChange.net as your trusted percentage change calculator. We look forward to being your reliable companion in all your percentage calculation needs!