Percentage
Difference.
Find the symmetric percentage difference between two values — the absolute difference divided by their average, useful when neither value is "more original" than the other.
Formula
% Difference = |V₁ − V₂| / ((|V₁| + |V₂|) / 2) × 100
Why average?
Unlike percent change, percentage difference is symmetric — it doesn't matter which value you put first. Dividing by the average keeps the result the same when V₁ and V₂ swap.
Frequently asked questions
What does Percentage Difference Calculator do?
Symmetric percent difference between two values. The whole thing runs in your browser tab, so it is ready the moment the page finishes loading.
Is Percentage Difference Calculator free to use?
Yes. Percentage Difference Calculator is completely free on ToolMunch — no trial, no premium tier holding back the main feature, and no daily or hourly cap on how many times you can use it.
Do I need to create an account or sign up?
No. There is no account, no email address, and no login. Open Percentage Difference Calculator, do the job, and take the result — nothing is gated behind a signup form.
Are the numbers I enter sent to a server?
No. Percentage Difference Calculator runs entirely inside your browser tab, so what you type never leaves your own device. Nothing is uploaded, which means there is no copy of it on a server to worry about.
Does Percentage Difference Calculator work on Mac, Windows, and phones?
Yes. Percentage Difference Calculator runs in any modern web browser on Windows, macOS, Linux, Chromebook, Android, and iOS. There is nothing to download or install.
Can I use it as many times as I want?
Yes. There is no queue, no per-hour quota, and no counter that runs out — run Percentage Difference Calculator as often as the work needs.