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Percentage Change Calculator

Math

Calculate percentage increase or decrease between two values with direction and magnitude.

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Percentage Calculator
Result

Enter values or use Example to calculate.

Tracking this month's revenue against last month's, or this year's numbers against last year's, is a comparison where the order genuinely matters, one value is clearly the starting point and the other is what it became, unlike comparing two unrelated numbers that were never really a before-and-after pair to begin with. This tool calculates the percentage increase or decrease between two values with their direction and magnitude, built specifically for tracking a metric that actually moved from one point to another over time.

See more about the Percentage Change Calculator

Useful for tracking a month-over-month or year-over-year change in a business metric where the order clearly matters, calculating how much a price actually increased between two specific dates, or measuring a metric's change from a clear starting point rather than comparing two values with no real before-and-after relationship.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

Quick answers for Percentage Change Calculator

How does it show whether the change was an increase or a decrease?
The Difference and % Change figures switch between a "+" prefix and no sign automatically based on your Old and New values, so a lower New Value produces negative numbers indicating a decrease, and a higher one produces positive numbers indicating an increase.
Which tab of the calculator do I use for this?
Select the "Change" tab at the top, since the same calculator also has separate Basic % and Tip tabs for different kinds of percentage math.
What happens if I enter the same value for Old and New?
The Difference shows 0 and the % Change shows 0.00%, since there was no change between the two values.