Percentage Calculator
Work out percentages, ratios, and changes — instantly.
How to use
Pick the type of calculation, enter the two numbers, and the answer appears live below.
About this tool
Answer the three most common percentage questions: what is X% of Y, X is what percent of Y, and the percentage change from one value to another. Results update live as you type, entirely in your browser.
What you can use Percentage Calculator for
- Calculate a tip or discount amount
- Find what percentage a score represents
- Work out a price increase or decrease
- Convert a fraction into a percentage
Frequently asked questions
What calculations are supported?
Three: 'what is X% of Y', 'X is what percent of Y', and 'percentage change from X to Y' (increase or decrease).
How is percentage change calculated?
As (new − old) ÷ old × 100. A positive result is an increase, a negative result is a decrease.
Is anything sent to a server?
No — every calculation runs locally in your browser.
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