Percentage Calculator

Frequently Asked Questions

What types of percentage calculations are supported?

Three types: calculate X% of Y, find what percentage X is of Y, and calculate percentage increase or decrease between two values.

Can I use decimals?

Yes. All input fields accept decimal numbers, and results are displayed to two decimal places.

How do I calculate a percentage increase?

Select the percentage change mode, enter the original value and the new value. The calculator shows the percentage increase or decrease automatically.

What is 20% of 150?

Enter 20 and 150 in the "What is X% of Y" mode and get the answer: 30.

How do I find what percentage one number is of another?

Use the "X is what percent of Y" mode. For example, enter 30 and 150 to find that 30 is 20% of 150.

Percentage Calculator — Calculate Any Percentage Instantly

Percentages are woven into every part of daily life — sale discounts, exam scores, tax rates, nutrition labels, poll results, investment returns, and more. Yet even simple percentage calculations can trip people up. Our Percentage Calculator handles the three most common types instantly, with no formula memorization required.

**What is X% of Y?** — Find the percentage of a number. For example: what is 15% of 240? Answer: 36.

**X is what percent of Y?** — Determine what percentage one number represents of another. For example: 45 is what percent of 180? Answer: 25%.

**Percentage change from X to Y** — Calculate increase or decrease. For example: from 80 to 96 is what percentage increase? Answer: 20%.

Common real-world applications include: calculating the final price after a discount, working out how much of a goal you have completed, converting a test score to a percentage, determining how much a price has risen or fallen, analyzing business metrics like conversion rate and growth, and calculating nutritional data from serving sizes.

All three calculation modes are available from a single interface. Results are shown to two decimal places and decimals are fully supported in inputs. Everything runs in your browser instantly — no loading, no account needed.

How to Use the Percentage Calculator

Select the calculation type from the tabs or dropdown.
Enter your values in the input fields.
Your result appears instantly as you type.
Switch between modes without clearing your inputs.