Free Online Percentage Calculator

Simplify your math with our easy-to-use percentage calculator. Whether you're calculating discounts, grades, tips, or growth rates, get accurate results in seconds.

What is P% of X?

Calculate a percentage of any number. Use this for tips, discounts, or portions.

Example: What is 15% of $80?
Answer: $12 (great for calculating a tip!)
Enter the percentage you want to calculate.
Enter the number to find a percentage of.

X is What % of Y?

Find out what percentage one number is of another. Perfect for grades or progress tracking.

Example: You scored 45 out of 60 on a test. What’s your percentage?
Answer: 75%
Enter the part value.
Enter the total value.

X is P% of What?

Discover the original number when you know a percentage and its result.

Example: $25 is 20% of what amount?
Answer: $125 (useful for budgeting!)
Enter the result value.
Enter the percentage.

Percentage Increase/Decrease

Measure how much a value has grown or shrunk as a percentage.

Example: A shirt’s price rose from $40 to $48. What’s the increase?
Answer: 20% increase
Enter the original value.
Enter the new value.

Percentage to Decimal/Fraction

Convert percentages to decimals or fractions for easier math.

Example: What’s 60% as a decimal and fraction?
Answer: Decimal: 0.60, Fraction: 3/5
Enter the percentage to convert.

Your Calculation History

Review your recent calculations or save them for later.

    Frequently Asked Questions

    How do I calculate a percentage of a number?

    Multiply the number by the percentage divided by 100. For example, 15% of 80 is 80 × (15/100) = 12.

    What is percentage increase used for?

    It shows how much a value has grown, like price hikes or salary raises, relative to the original amount.

    Can I use this for school assignments?

    Yes! It’s great for homework, test prep, or learning how percentages work.

    Why convert percentages to fractions?

    Fractions can make some calculations easier and are often required in math classes.