Percentage Difference Calculator
Calculate the percentage difference between two numbers. Shows increase, decrease, and absolute vs relative change. Free and instant.
How to use the % Difference
Three modes of percentage comparison
% Change measures the change from an original value to a new one — useful for price changes, growth rates. % Difference is symmetric — it doesn't assume which value is the "original". A is what % of B finds the ratio as a percentage.
Change vs difference
Going from 80 to 100 is a 25% increase. But the "percentage difference" between 80 and 100 is 22.2% (because the denominator is the average of both values). Use % change when you have a clear before-and-after, and % difference when comparing two peer values.
Frequently asked questions
Is the % Difference free to use?
Yes, the % Difference is completely free. There is no sign-up, no account required, and no limit on how often you can use it.
How accurate is the % Difference?
The % Difference uses standard mathematical formulas and produces results accurate to standard precision. For critical applications, always verify with an authoritative source.
What devices does the % Difference work on?
The % Difference works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.