Percentage Calculator

What is X% of Y?

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Percentage change from A to B

Percentage Change
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X is what percentage of Y?

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Add or subtract a percentage from a number

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⚠ Negative percentage: Add and Subtract results will be flipped.
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Subtract
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What Is a Percentage Calculator?

A percentage calculator is an online tool that helps you quickly solve any percentage-related problem — without needing to remember formulas or grab a physical calculator. Whether you want to find out what 15% of 200 is, calculate how much a price has increased, or figure out what percentage one number is of another, a percentage calculator gives you the answer instantly.

Clear Calculator's free percentage calculator covers the four most common percentage problems people search for every day, all in one clean and easy-to-use interface.

The 4 Types of Percentage Calculations

Most percentage questions fall into one of four categories. Here's what each mode on our calculator does:

1. What is X% of Y?

This is the most common type. You know the percentage and the total, and you want to find the actual value. For example: "What is 20% of 150?" The answer is 30. Use this for calculating discounts, tips, taxes, or commissions.

2. Percentage Change

This tells you by how much a value has increased or decreased in percentage terms. For example, if a product's price went from $80 to $100, that's a 25% increase. This mode is useful for tracking price changes, salary raises, or stock performance.

3. X is What Percentage of Y?

Here you know both numbers and want to express their relationship as a percentage. For example: "30 is what percentage of 200?" The answer is 15%. This is useful for grading, statistics, and comparing values.

4. Add or Subtract a Percentage

This mode lets you add or subtract a percentage directly from a number in one step. For example: "What is 200 plus 15%?" The answer is 230. This is perfect for calculating final prices after tax, or prices after a discount has been applied.

Percentage Formulas Explained

If you want to understand the math behind the results, here are the four core formulas:

X% of Y = (X ÷ 100) × Y
% Change = ((New − Old) ÷ |Old|) × 100
X is what % of Y = (X ÷ Y) × 100
Add %: Result = Y × (1 + X/100)
Subtract %: Result = Y × (1 − X/100)

Our calculator applies these formulas automatically so you never have to do the mental math yourself.

Everyday Examples

Here are some real-world situations where a percentage calculator comes in handy:

20% discount on a $85 item
= $68.00
15% tip on a $60 restaurant bill
= $9.00
Price increase from $40 to $52
= +30%
Score of 42 out of 60 points
= 70%
19% VAT on a $200 product
= $238.00
Salary raise from $3,000 to $3,300
= +10%
💡 Quick tip: To calculate a discount price in your head, subtract the discount percentage from 100, then multiply. A 25% discount means you pay 75% of the original price. So $120 × 0.75 = $90.

Frequently Asked Questions

To find X% of a number Y, divide X by 100 and multiply by Y. For example, 20% of 150 = (20 ÷ 100) × 150 = 30. Our calculator does this automatically — just enter the percentage and the number.
Subtract the original value from the new value, divide by the original value, then multiply by 100. For example: from 80 to 100 → (100 − 80) ÷ 80 × 100 = 25% increase. Use the "% Change" tab on our calculator for instant results.
Divide the first number by the second number, then multiply by 100. For example: 30 out of 200 = (30 ÷ 200) × 100 = 15%. Use the "X is what % of Y" tab on our calculator.
To add X% to a number Y, use: Y × (1 + X/100). To subtract: Y × (1 − X/100). For example, adding 19% VAT to $100: 100 × 1.19 = $119. Our "Add / Subtract %" tab shows both results at once.
Yes! To find 10% of any number, simply move the decimal point one place to the left. So 10% of 250 = 25, and 10% of 84 = 8.4. For 5%, halve the 10% result. For 20%, double it.
To find the price after a discount, use the "Add / Subtract %" tab. Enter the original price and the discount percentage — the calculator will show the discounted price under "Subtract." For example, $80 minus 25% = $60.
Use the "Add / Subtract %" tab. Enter the net price and the VAT rate (e.g. 19% or 20%), and the calculator will show the gross price including tax under "Add." For example, $200 + 19% VAT = $238.
Yes, completely free. No account, no sign-up, no limits. Just open the page and start calculating.

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