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Percentage Calculator

Choose your calculation type and enter the values

Choose Your Calculation

Select a calculation type and enter values

Choose one of the calculation modes above and fill in the required fields to see results

Common Examples

Real-world examples to help you understand percentage calculations and see how they apply in everyday situations.

Quick Examples

What is 15% of $120? $18.00
25 is what % of 100? 25%
20% tip on $50 bill $10.00
30% off $200 item $140.00

Percentage Formulas

Basic Percentage:
(Part ÷ Whole) × 100 = Percentage
Percentage of Amount:
(Percentage ÷ 100) × Amount = Result
Percentage Change:
((New - Old) ÷ Old) × 100 = % Change

How to Use the Percentage Calculator

Your complete guide to percentage calculations

Our percentage calculator handles the most common percentage calculations you encounter in daily life. Simply select the type of calculation you need and enter your values.

1

Basic Percentage (What % is X of Y?)

Use this to find what percentage one number represents of another. For example, if you scored 85 out of 100 on a test, you can find that 85 is 85% of 100.

2

Percentage of Amount (What is X% of Y?)

Calculate a specific percentage of a given amount. This is useful for calculating discounts, tax amounts, tips, or any portion of a total.

3

Percentage Change

Determine the percentage increase or decrease between two values. This is commonly used in finance, statistics, and comparing data over time.

4

Tip Calculator

Calculate tips for restaurants, delivery services, or any service industry. Includes bill splitting functionality for groups.

Percentage Calculator FAQ

Common questions about percentage formulas, changes, discounts, and rounding.

What is the easiest way to calculate a percentage?

Divide the part by the whole, then multiply by 100. For example, 25 out of 80 is 25 / 80 x 100 = 31.25%.

How do I calculate a percentage increase or decrease?

Subtract the old value from the new value, divide by the old value, then multiply by 100. A positive result is an increase and a negative result is a decrease.

What is the difference between percentage and percentage points?

Percentage describes relative change. Percentage points describe the direct difference between two percentages, such as moving from 20% to 25%, which is a 5 percentage point increase.

Can I use this for tips, discounts, and tax?

Yes. Use the percentage-of-amount mode for tips, discounts, sales tax, fees, commissions, and similar everyday calculations.

Why do percentage results sometimes have decimals?

Many percentage calculations do not divide evenly. Decimal places keep the result accurate, and you can round the final answer to match your use case.