Percentage Calculator

What is a Percentage Calculator?

A Percentage Calculator is a free online tool that allows you to quickly compute percentages in various ways. Whether you need to find a percentage of a number, determine what percentage one number is of another, calculate percentage change, or find the percentage difference between two values, this tool handles it all.

How to Use This Percentage Calculator?

• Select a Mode: Use the dropdown to pick the type of percentage calculation you need.
• Enter Values: Fill in the input fields with your numbers.
• Calculate: Click "Calculate" to instantly see the result.
• Copy Result: Use the copy button to copy the result to your clipboard.
• Reset: Press "Reset" to clear all inputs and start a new calculation.

Supported Calculation Modes

1. What is X% of Y?

Calculates a percentage of a given number. For example, "What is 15% of 200?" gives you 30. The formula used is: Result = (Percentage / 100) × Number.

2. X is what % of Y?

Determines what percentage one number represents of another. For example, "25 is what % of 200?" gives you 12.5%. The formula used is: Percentage = (Value / Total) × 100.

3. X is Y% of what?

Finds the total number when you know a value and its percentage. For example, "50 is 25% of what?" gives you 200. The formula used is: Total = (Value / Percentage) × 100.

4. Percentage Difference

Calculates the percentage difference between two values. The formula used is: Difference = (|V1 - V2| / ((|V1| + |V2|) / 2)) × 100. For example, the percentage difference between 10 and 20 is 66.67%.

5. Percentage Change

Measures the percentage increase or decrease from one value to another. The formula used is: Change = ((New Value - Old Value) / |Old Value|) × 100. For example, going from 100 to 150 represents a 50% increase.

Common Uses of a Percentage Calculator

• Finance & Business: Calculate discounts, markups, profit margins, tax rates, and interest rates for financial planning and analysis.
• Education: Determine test scores, grades, and academic performance metrics by converting raw scores into percentages.
• Data Analysis: Compare data sets, track changes, and measure growth rates in statistical and research contexts.
• Health & Fitness: Track body fat percentage, weight loss progress, and nutritional intake changes over time.
• Shopping: Quickly calculate sale prices, tip amounts, and savings when shopping online or in-store.

Frequently Asked Questions (FAQs)

How do I calculate a percentage of a number?

To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, 15% of 200 = (15 × 200) / 100 = 30.

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

Divide the first number by the second number and multiply by 100. For example, to find what percentage 25 is of 200: (25 / 200) × 100 = 12.5%.

What is percentage difference?

Percentage difference compares two values by dividing the absolute difference by their average, then multiplying by 100. It shows how far apart two values are relative to their mean.

What is percentage change?

Percentage change measures the relative increase or decrease from an original value to a new value. The formula is: ((New Value - Old Value) / |Old Value|) × 100.

What is the difference between percentage change and percentage difference?

Percentage change measures the change from one specific value to another (directional), while percentage difference measures how two values differ relative to their average (non-directional).