Percentage Calculator Online - Free & Fast
Find X% of any number, calculate ratios, and solve percentage problems instantly.
20% of 150
30,00
(150 × 20) / 100 = 30,00
Use it for discounts, taxes, tips, interest rates and statistics.
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Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage (as a decimal). For example, to find 20% of 150, compute 150 × 0.20 = 30. Our calculator does this instantly for you.
What is the formula to find what percent one number is of another?
Divide the first number by the second, then multiply by 100. For instance, 30 is what percent of 200? (30 ÷ 200) × 100 = 15%.
Can this calculator handle percentage increase and decrease?
Yes. Enter the original value and the new value, and the calculator will show the percentage change, including whether it increased or decreased.
What is a Percentage?
A percentage is a fraction of 100, used to express how large or small one quantity is relative to another. For example, 50% means 50 out of 100, or half. Percentages are widely used in finance, statistics, and everyday calculations to compare values and track changes.
How to Use the Percentage Calculator
Enter any number and a percentage to find the exact value. To determine what percent one number is of another, simply input both values. The calculator also handles percentage increase and decrease, making it ideal for discounts, tips, and tax calculations. Results appear instantly after clicking the button.
Percentage Formulas
The core formula is: (Part / Whole) × 100 = Percentage. To find a part of a whole, multiply the whole by the percentage divided by 100. For percentage change, subtract the original value from the new value, divide by the original, and multiply by 100.