Percentage Calculator — Find Percentage Online

Free percentage calculator. Find percentage of a number, calculate percentage increase, decrease, and difference between two values instantly.

Percentage Calculator

How to Use

Select the type of percentage calculation you need from the buttons above.

Enter your two values. The field labels change based on the selected type.

Click Calculate. The result shows the answer and the formula used.

What is a Percentage Calculator?

A percentage calculator helps you solve the most common percentage problems: finding what a percentage of a number is, determining what percent one number is of another, calculating percentage change between two values, increasing or decreasing a number by a percentage, and finding the percentage difference between two numbers. It's useful for school, shopping discounts, financial analysis, data comparison, and everyday math.

Frequently Asked Questions

How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 = (20 × 150) / 100 = 30.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 is what % of 150? (30 / 150) × 100 = 20%.
How is percentage change calculated?
Percentage change = ((new value - old value) / old value) × 100. A positive result is an increase, negative is a decrease.
What is percentage difference?
Percentage difference compares two values by dividing the absolute difference by their average, then multiplying by 100. It shows how far apart two values are relative to their midpoint.
Can I use decimals?
Yes. All inputs accept decimal numbers for precise calculations.

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