Percentage Calculator - Free Online Tool

Select Calculation Type

Choose what you want to calculate:

% Find Percentage

Calculate what percentage one number is of another.

Part (The smaller value)

Enter the part value (numerator)

Whole (The total value)

Enter the total value (denominator)

# Find Value from Percentage

Calculate the value when you know the percentage of a total.

Percentage (%)

Enter the percentage (like 25 for 25%)

Total Value

Enter the total/whole amount

∑ Find Total from Percentage

Find the total when you know a part and what percentage it represents.

Part Value

Enter the part/portion value

Percentage (%)

What percentage does the part represent?

↑ Percentage Increase

Calculate the percentage increase from an original value to a new value.

Original Value

Starting/initial value

New Value

Final/increased value

↓ Percentage Decrease

Calculate the percentage decrease from an original value to a new value.

Original Value

Starting/initial value

New Value

Final/decreased value

Calculation Result

Step-by-Step Calculation:

Quick Examples:

What percentage is 45 of 50?

What is 20% of 500?

What is the percentage increase from 100 to 125?

Percentage Calculator: Solve All Percentage Problems Instantly

Our free percentage calculator helps you solve any percentage-related calculation with ease. Whether you're calculating discounts, tax rates, tips, academic scores, or business metrics, this tool provides accurate results instantly.

What Can You Calculate?

Find Percentage: What is X% of Y?
Find Value from Percentage: X is what percent of Y?
Find Total from Percentage: If X is Y%, what is the total?
Percentage Increase: Calculate percentage growth
Percentage Decrease: Calculate percentage reduction

How to Use This Calculator

Select Calculation Type from the 5 options above
Enter Values in the input fields (only relevant fields shown)
Click Calculate to get instant results
View Detailed Solution with formula and steps

Real-World Applications

Students & Teachers: Calculate test scores, grade percentages, and academic performance metrics.

Shoppers: Calculate discounts during sales, determine final prices after percentage off.

Business Professionals: Calculate profit margins, tax rates, commission percentages, and growth metrics.

Financial Planning: Calculate interest rates, investment returns, and loan percentages.

Percentage Formulas Used

Percentage Formula: (Part ÷ Whole) × 100 = Percentage
Value from Percentage: (Percentage ÷ 100) × Total = Value
Total from Percentage: Part ÷ (Percentage ÷ 100) = Total
Percentage Increase: [(New - Original) ÷ Original] × 100
Percentage Decrease: [(Original - New) ÷ Original] × 100

Why Use Our Percentage Calculator?

✓ Simple Interface: One calculator at a time, no confusion

✓ Multiple Calculation Types: 5 different percentage calculations

✓ Educational: Shows formulas and step-by-step solutions

✓ 100% Free: No registration, no limits

✓ Mobile-Friendly: Works perfectly on all devices

✓ Instant Results: Calculate in real-time

Common Percentage Calculations Explained

Example 1: Finding a Percentage
If you scored 45 marks out of 50, your percentage is (45 ÷ 50) × 100 = 90%

Example 2: Calculating Discount
A $200 item with 25% discount: Discount = 25% of $200 = $50. Final price = $150

Example 3: Percentage Increase
Salary increased from $50,000 to $55,000: Increase = [(55,000 - 50,000) ÷ 50,000] × 100 = 10%

Disclaimer: This tool provides mathematical calculations for educational and general purposes. For critical financial or scientific calculations, please verify results with professional tools.