Percent Change Calculator
Need to measure percentage increase or decrease? Percent Change Calculator does it in the browser, in a couple of clicks. Every figure is worked out on your own device using standard formulas — nothing you type is transmitted, which matters when the numbers are your salary, loan or health data. It is used most by freelancers pricing work and checking margins. Results update as you type, so you can see the effect of changing one figure. There is no account to create, no email to hand over and no cap on how often you use it.
Key features
- Results update as you type, so you can see the effect of changing one figure.
- Uses double-precision arithmetic, accurate well beyond everyday needs.
- Works on desktop, tablet and phone — no separate app to install.
- Built to do one job properly rather than twenty jobs badly.
How to use Percent Change Calculator
- Enter your figures: Fill in the fields above. Leave anything optional blank and a sensible default is used.
- Pick your units: Switch between metric and imperial if the calculation involves units.
- Read the result: The answer updates immediately, with the breakdown shown so you can check the working.
Frequently asked questions
- Can I rely on this for a formal decision? — Treat Percent Change Calculator as a quick indication. For anything binding — a mortgage, a tax return, a medical decision — confirm with a qualified professional.
- Are my numbers sent anywhere? — No. The calculation runs in your browser. Salary, loan and health figures never leave the device.
- Why does my answer differ from another site? — Usually a different formula variant or rounding step. Check the inputs match before assuming one is wrong.
- Does it support metric and imperial? — Yes, where the calculation involves units you can switch between them and the result converts with you.