Percentage Calculator
Calculate percentages, percentage change, tips and discounts.
What is X% of Y?
X is what % of Y?
Percentage Change
Tip Calculator
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How to use Percentage Calculator
- 1Choose your calculation type
- 2Enter the required values
- 3Get instant results
- 4Use for discounts, tips, grades, or data analysis
Pro tip: Perfect for quickly calculating sale prices, tax amounts, or grade percentages.
What is a Percentage Calculator?
A percentage calculator performs common percentage operations: finding what percent one number is of another, calculating percentage increase or decrease, finding a percentage of a number, and more. It's useful for everyday calculations like discounts, tips, tax, grade calculations, and data analysis. Our free calculator gives instant results with no signup required.
When to Use a Percentage Calculator
- Calculating sale prices and discounts while shopping
- Figuring out tip amounts at restaurants (15%, 18%, 20%)
- Computing tax amounts or profit margins for business
- Determining grade percentages for courses and exams
- Analyzing percentage change in data, stocks, or metrics
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 25% of 200 = (200 × 25) / 100 = 50. Our calculator does this instantly for any values.
How do I calculate percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) × 100. For example, if a price goes from $80 to $100, the increase is ((100-80)/80) × 100 = 25%.
What's the difference between percentage and percentage points?
A percentage is relative, while percentage points are absolute. If interest goes from 5% to 7%, that's a 2 percentage point increase but a 40% relative increase ((7-5)/5 × 100).
How do I reverse a percentage?
To find the original price before a discount: divide the final price by (1 - discount/100). For example, if you paid $75 after a 25% discount: $75 / (1 - 0.25) = $75 / 0.75 = $100 original price.