Percentage Change Calculator

Calculate percentage increase or decrease between two values instantly with our free online tool

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Instant Calculation

Get results in real-time as you type

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Clear Visual Results

Color-coded output for increase/decrease

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Real-World Examples

Learn how to apply percentage changes in finance, business, and daily life

🔒 Client-Side Processing
All calculations happen in your browser. Your data never leaves your device.

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How to Calculate Percentage Change

The percentage change formula helps you understand the relative difference between two values. Here's the standard formula:

[( New Value - Initial Value ) ÷ Initial Value ] × 100

A positive result indicates an increase, while a negative result shows a decrease.

Real-World Examples

Salary Increase

Initial: $45,000 → New: $52,000

+15.56%

Your salary increased by 15.56% — a significant raise!

Price Drop

Initial: $899 → New: $649

-27.81%

The price decreased by 27.81% — great deal!

Sales Growth

Initial: 1,200 → New: 1,850

+54.17%

Sales increased by 54.17% — excellent performance!

Common Use Cases

Scenario Calculation Purpose Example
Personal Finance Track budget changes Rent increase from $1,200 to $1,350
Business Analytics Measure growth metrics Q3 revenue vs Q2 revenue
Academic Grading Calculate score improvement Test scores from 75 to 88
Economics Analyze inflation rates CPI change over 12 months

Frequently Asked Questions

How do I calculate percentage change?

Subtract the initial value from the new value, divide by the initial value, then multiply by 100. Example: ((150 - 120) / 120) × 100 = 25%

What does a negative percentage mean?

A negative result indicates a decrease. For example, -20% means the value decreased by 20%.

Can I use this for stock market analysis?

Yes! This calculator is perfect for tracking stock price changes, portfolio growth, or market index movements.

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