Percentage Change Calculator
Calculate the percentage change between two values. Useful for determining price increases, discounts, or growth rates.
Calculate Percentage Change
Enter the original value (a) and the new value (b) to calculate the percentage change.
Apply to a Price or Value
See how this percentage change affects a specific price or value.
Percentage Change Formula
To calculate the percentage change between two values, use the following formula:
Percentage Change = (New Value - Original Value) / Original Value × 100
Share this tool
Frequently Asked Questions
Find the answers to the most frequently asked questions below. If your question isn't here, or you need more info, or have feedback, please reach out.
What's the difference between percentage change and percentage points?
How do I calculate a discount using percentage change?
What is a good calculator for stock market returns?
Why does calculating percentage increase then decrease not get me back to the original number?
How do I calculate the markup percentage for retail pricing?
Related Calculation Tools
Convert running pace from minutes per kilometer (min/km) to kilometers per hour (kph). Check your running speed. For fast runners, marathoners and athletes.
Convert numbers to roman numerals or the other way around. Enter a number and get the roman numeral version.
Calculate the number of days between two dates. For calculating the number of days since events, how many days alive or duration of a project.
Calculate the hours when the intermittent fasting cycle ends with a simple fasting clock.