Percentage calculator
Work out "what is X% of Y", "X is what percent of Y", and percentage increase or decrease.
About this tool
Three of the percentage questions that come up most often - tips, discounts, tax, grades, change over time - solved in one place. Each mode has its own two inputs and gives you the answer plus a short plain-language explanation so you can check it makes sense.
How to use it
- Pick the mode that matches your question.
- Fill in the two values.
- Read the answer and the one-line explanation below it.
FAQ
What is the difference between percentage change and percentage points?
Percentage change is relative to the starting value (going from 20 to 25 is a 25% increase). Percentage points are the raw difference (20% to 25% is 5 percentage points). This tool reports percentage change.
Can I use negative numbers?
Yes - useful for percentage decrease and change calculations.