Percentage
Increase.
Apply a percentage increase to a starting value — or work backward from two values to see how much it has grown. Live in your browser.
Percentage increase formula
New = Original × (1 + p/100) Diff = New − Original = Original × p/100
Reverse — between two values
p = (New − Original) / Original × 100
Frequently asked questions
What does Percentage Increase Calculator do?
Percent change from a lower number to a higher one. The whole thing runs in your browser tab, so it is ready the moment the page finishes loading.
Is Percentage Increase Calculator free to use?
Yes. Percentage Increase 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 Increase 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 Increase 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 Increase Calculator work on Mac, Windows, and phones?
Yes. Percentage Increase 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 Increase Calculator as often as the work needs.