Everyday
％ Percentage Calculator
Find percent of a value or a percent change
Loading interactive percentage calculator…
About the Percentage Calculator
Two of the most common percentage questions answered in one place: "What is X% of Y?" and "X is what % of Y?" Useful for tips, taxes, discounts, test scores, sales targets and quick mental maths checks.
Type the numbers and the result updates instantly. No equals button needed.
How it works
- Pick the question you want answered.
- Enter the two numbers.
- Read the result as the percentage or value updates live.
What you'll learn
- How to convert between fractions, decimals and percentages.
- How to calculate percentage change between two values.
FAQs
- How do I calculate a percentage in my head?
- 10% of any number is the number divided by 10. Use that to build up other percentages.
- What is the formula for percentage change?
- (New - Old) / Old, then multiply by 100.