How to Use the Percentage Calculator
Our free Percentage Calculator makes it easy to solve any percentage problem in seconds. Whether you're calculating tips, discounts, tax, grade scores, or interest rates — this tool handles all 7 common percentage calculations instantly.
What is X% of Y?
Find a percentage of any number. Example: What is 15% of 200? → Answer: 30. Perfect for calculating tips, commissions, and discounts.
Percentage Change
Calculate the percentage increase or decrease between two values. Widely used in finance, stock markets, and sales reports to track growth trends.
Margin & Markup
Easily calculate gross profit, margin, and markup percentages. Essential for sellers and business owners to ensure perfect pricing.
Compound Interest
Watch your money grow. Visualize how initial investments and monthly contributions compound over time with our intuitive charting tool.
Percentage Formula Reference
Frequently Asked Questions
How do I calculate a percentage of a number?
To find X% of Y, multiply Y by X and divide by 100. Example: 20% of 150 = (150 × 20) ÷ 100 = 30.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, then multiply by 100. Formula: ((New − Old) ÷ Old) × 100.
What is the difference between percentage and percentage points?
A percentage is a ratio expressed per 100. A percentage point is the arithmetic difference between two percentages. For example, going from 10% to 15% is an increase of 5 percentage points, but a 50% relative increase.