Percentage Calculator
Calculate percentages, tips, discounts, margins, and more with live results.
Basic Calculations
What is X% of Y?
X is what % of Y?
Percentage change from X to Y
X increased by Y%
X decreased by Y%
Tip Calculator
Discount Calculator
Margin vs Markup
Margin = profit / selling price. Markup = profit / cost.
Quick Reference Table
| Percentage | Value | Visual |
|---|---|---|
| 5% | 5 | |
| 10% | 10 | |
| 15% | 15 | |
| 20% | 20 | |
| 25% | 25 | |
| 33.33% | 33.33 | |
| 50% | 50 | |
| 66.67% | 66.67 | |
| 75% | 75 | |
| 100% | 100 |
History
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What is a Percentage Calculator?
A percentage calculator solves common percentage problems: finding a percentage of a number, calculating what percentage one number is of another, finding percentage increase or decrease, and computing original values from percentage changes. Essential for data analysis, finance calculations, and everyday math.
Common Use Cases
- •Calculating discounts and sales tax amounts
- •Computing percentage change between two values
- •Finding grade percentages and score ratios
- •Calculating tip amounts at restaurants
- •Converting between fractions, decimals, and percentages
Frequently Asked Questions
How do I calculate percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) × 100. For example, if a stock went from $50 to $65: ((65-50)/50) × 100 = 30% increase.
What is the difference between percentage points and percent?
If an interest rate goes from 5% to 8%, it increased by 3 percentage points but increased by 60 percent ((8-5)/5 × 100). Percentage points measure the absolute difference between two percentages; percent measures relative change.