Percentage Calculator

Calculate Percentage

Choose a mode and enter your values

Choose a mode, enter numbers, then press Calculate. Results are shown instantly.

Percentage (X)

Value (Y)

Results & Actions

Calculate and view your percentage results

Result

Ready to calculate

How It Works

Select one of three calculation modes, enter your values, and get instant results. Our calculator uses standard percentage formulas for accuracy.

Common Uses

Calculate discounts, tax amounts, test scores, salary increases, investment returns, and much more with this versatile tool.

Always Accessible

Works completely in your browser - no data sent to servers. Use it anytime, anywhere with full privacy protection.

Percentage Formulas

What is X% of Y?

Result = (X / 100) × Y

X = percentage, Y = whole value

X is what percent of Y?

Percent = (X / Y) × 100

X = part value, Y = whole value (Y ≠ 0)

Percentage Increase/Decrease

Change% = ((New - Old) / Old) × 100

New = new value, Old = original value (Old ≠ 0)

Step-by-Step Examples

Discount Calculation

What is 15% of $200? → (15 ÷ 100) × 200 = 0.15 × 200 = 30

15% of $200 is $30

Test Score Percentage

45 is what percent of 60? → (45 ÷ 60) × 100 = 0.75 × 100 = 75

45 is 75% of 60

Salary Increase

From $50,000 to $55,000 → ((55,000 - 50,000) ÷ 50,000) × 100 = (5,000 ÷ 50,000) × 100 = 10

10% salary increase

Understanding and Utilizing the Percentage Calculator

Percentages are fundamental to everyday life, from calculating discounts and tips to analyzing financial data and understanding statistics. A Percentage Calculator is an indispensable tool that simplifies this process, making complex proportional relationships instantly accessible. This short article introduces the calculator, explains the simple math behind it, and demonstrates its practical application.

What is a Percentage Calculator?

The Percentage Calculator is a versatile digital tool designed to solve problems involving percentages quickly and accurately. Instead of manually performing multiplication and division, the calculator allows users to input known values and instantly find an unknown percentage, the value corresponding to a percentage, or the proportional change between two numbers.

Core Functions of the Percentage Calculator

A comprehensive Percentage Calculator typically offers three main functions, each derived from the core formula:

Finding the Percentage: It answers the question, "What percent of X is Y?" (e.g., What percent of 50 is 10?).
Finding the Part: It answers the question, "What is P% of X?" (e.g., What is 20% of 50?).
Percentage Change: It answers the question, "What is the percentage increase or decrease from A to B?" (This is crucial for finance and growth analysis).

How the Calculator Works (The Simple Math)

The calculator acts as a digital intermediary, efficiently performing the multiplication and division steps that convert between decimals, fractions, and percentages.

Practical Example: Calculating a Retail Discount

Imagine you are buying a jacket priced at $180, and a store offers a 15% promotional discount. How much is the discount amount, and what is the final price?

Goal 1: Find the Discount Amount (What is 15% of $180?)

Calculator Input:

Percentage: 15
Whole Number: 180

Calculator Output: The discount is $27.

The Math: 0.15 × 180 = 27

Goal 2: Find the Final Price

Calculation: Subtract the discount from the original price.

Calculator Output: $180 - $27 = $153.

Frequently Asked Questions

Is this calculator accurate?

Yes, it uses standard arithmetic formulas. Verify with a small example if results are mission-critical.

Can I use negative numbers?

Negative numbers are accepted if they represent valid values, such as losses. Interpret results accordingly.

Does this calculator round results?

Results present full precision. Round to two decimals for reporting if needed.

Do I need to convert fractions or decimals before calculating?

No, the calculator accepts whole numbers, decimals, and fractions. It automatically converts them into percentage values accurately.

What percentage formulas does this calculator support?

It handles all standard percentage operations, finding percentages, percentage increase / decrease, and converting values to and from percentages.

Is any data sent to the server?

No, calculations are client-side. Analytics events are obfuscated and don't contain personal data.