Percentage Calculator
Calculate percentages, percentage change, and percentage of numbers.
How to Use
Choose calculation type
Select the percentage calculation you need.
Enter values
Enter the numbers for calculation.
Get result
See the calculated percentage instantly.
Features
Frequently Asked Questions
Calculate X% of Y, what % is X of Y, percentage increase/decrease, and find original value from percentage.
Percentage calculations are everywhere - from calculating discounts and tips to understanding statistics and financial reports. Our calculator handles all common percentage operations: finding percentages, calculating percentage change, and determining what percentage one number is of another.
Did You Know?
The word 'percent' comes from Latin 'per centum' meaning 'by the hundred'. The % symbol evolved from an Italian abbreviation 'p cento' used by merchants in the 15th century!
Pro Tips
- To find 20% of a number, multiply by 0.20 (or divide by 5)
- Percentage change = (new - old) / old × 100
- A 50% increase followed by a 50% decrease doesn't return to the original!
- Quick tip: 15% = 10% + 5% (useful for calculating tips)
Common Use Cases
- Calculating discounts and sale prices
- Computing tips at restaurants
- Understanding financial growth rates
- Analyzing test scores and grades
- Determining tax amounts on purchases
Best Practices
- Always clarify: percentage of what? (the base matters)
- Round percentages appropriately for your context
- Be careful with compound percentage changes
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