Percentage Calculator
Calculate percentages in three different ways.
What is Percentage Calculator?
Percentage Calculator solves the three most common percentage problems: finding what a percentage of a number is, determining what percent one number is of another, and calculating the percentage change between two values. These calculations come up constantly in finance, shopping, grades, and data analysis.
How to Use
- Pick a calculation type using the tabs above the card.
- Type your numbers — results appear instantly as you type.
- No buttons needed — calculations are live and automatic.
Frequently Asked Questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. For example, 25% of 200 = (25/100) × 200 = 50. This is useful for calculating tips (15% of a bill), discounts (30% off a price), or tax amounts.
How is percentage change calculated?
Percentage change = ((New Value - Old Value) / |Old Value|) × 100. A positive result means an increase; negative means a decrease.
What is the difference between percentage and percentage points?
If a rate goes from 10% to 15%, that's a 5 percentage point increase but a 50% relative increase. Percentage points measure the arithmetic difference; percentage measures the relative change.
