Percentage Calculator

What is a Percentage?

A percentage is a number or ratio expressed as a fraction of 100. The word percentage comes from the Latin "per centum" meaning "by the hundred." For example, 45% (45 percent) means 45/100, or 45 parts per hundred.

Common Uses of Percentages

• Shopping discounts and sales (20% off)
• Academic grades (95% on a test)
• Statistics (75% of people)
• Financial calculations (6% interest rate)
• Progress indicators (60% complete)
• Restaurant tips (15% gratuity)
• Tax rates (8.5% sales tax)

Why Use Percentages?

• Make comparisons easier across different scales
• Standardize measurements for better understanding
• Show proportional relationships clearly
• Simplify complex numerical relationships

What is Percentage Calculator?

A percentage calculator is a digital tool that helps you perform various percentage-based calculations quickly and accurately. It eliminates the need for manual calculations and reduces human error in computing percentages, discounts, increases, and other percentage-related problems.

How to Use the Percentage Calculator

Basic Percentage Calculations

X is What Percent of Y Calculator (Find a percentage of a number):

1. Enter the percentage in the first box
2. Enter the number in the second box
3. Click "Calculate" to see the result
4. Example: To find 20% of 50, enter 20 and 50

What is X Percent of Y Calculator (Find what percentage one number is of another):

1. Enter the first number (the part)
2. Enter the second number (the whole)
3. Click "Calculate" to see what percentage the first number is of the second
4. Example: To find what percentage 20 is of 50, enter 20 and 50

X is Y Percent of What Calculator (Find the total when you know a percentage):

1. Enter the known number
2. Enter the percentage it represents
3. Click "Calculate" to find the total
4. Example: If 20 is 40% of a number, enter 20 and 40

More percentage calculators

• Percent Error Calculator: Calculates the difference between measured and actual values.
• Percent Change Calculator: Computes the change between old and new values as a percentage.
• Percent Increase Calculator: Determines the percentage increase from an initial value to a final value.
• Percent Difference Calculator: Measures the relative difference between two values as a percentage.
• Percent Yield Calculator: Calculates the ratio of actual yield to theoretical yield in chemical reactions.
• Percent Off Calculator: Computes final prices after applying percentage discounts.
• Percent Decrease Calculator: Determines the percentage decrease from an initial value to a final value.
• How to Find the Percent of a Number: Explains basic percentage calculation methods and formulas.