EVERYDAY TOOLS / PERCENTAGE CALCULATOR
Percentage Calculator
Make percentages make sense.
Find a percentage, measure a change, or work backwards to the original value.
✓ Free to use◈ Runs in your browserNo signup
01 Your input
02 Your result
LOCAL ONLYReady when you are. Try an example to get started.
A LITTLE CONTEXT
Simple inputs.
Useful answers.
How this tool works
Percentage change is (new − original) ÷ original × 100. A zero original has no defined percentage change. Reverse calculations divide by the percentage factor. An original value before a 100% decrease cannot be recovered.
Is my input uploaded or saved?
No. This page processes your input in your browser and does not save it between visits. Downloads and copied results stay under your control.
How do I save the result?
Use Copy result or Download after generating a result. Changing inputs clears the previous result so you do not accidentally save an outdated answer.
KEEP MAKING THINGS EASIER