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Percentage Change Calculator

Find the percentage increase or decrease between two values.

Percentage Change

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Free Percentage Change Calculator — Find Increase or Decrease Instantly

Whether you're tracking a salary raise, comparing sale prices, or analyzing business growth, knowing the exact percentage change between two numbers is essential. Our free Percentage Change Calculator instantly computes the increase or decrease between an old and new value, with the full formula shown for transparency.

Why Use This Tool

  • Instant, clear results: See the percentage change immediately, color-coded green for increase and red for decrease.
  • Formula transparency: View the exact calculation used for every result.
  • No signup needed: Just enter two numbers and get your answer.
  • Handles any scale: Works for prices, salaries, populations, or business metrics.

Key Features

Color-Coded Results

Green for increase, red for decrease.

Calculation History

Recent results saved locally for reference.

Step-by-Step: How to Use

Step 1: Enter the original (Old) value.

Step 2: Enter the updated (New) value.

Step 3: Click "Calculate Change" to instantly see the percentage increase or decrease.

Benefits

  • Removes manual calculation errors when comparing two figures.
  • Useful across finance, retail, HR, and everyday comparisons.
  • Fast enough to use repeatedly while analyzing multiple data points.

Common Use Cases

  • Calculating a salary raise or pay cut percentage.
  • Measuring price changes between two shopping periods.
  • Tracking month-over-month or year-over-year business growth.
  • Comparing exam scores or performance metrics over time.

Privacy & Security

All calculations run locally in your browser. Your numbers are never uploaded — only saved in your own browser's local storage for quick history reference.

Frequently Asked Questions

What does a negative result mean? +
A negative percentage indicates the value has decreased from the old value to the new value.
((New − Old) ÷ Old) × 100. Positive means increase, negative means decrease.
Percentage change tracks direction from an original value; percentage difference often compares two values without a fixed "original."
Yes, enter old salary as Old Value and new salary as New Value.
The formula divides by the old value, so zero makes the calculation undefined.
Enter the original price as Old Value and the discounted price as New Value.
Yes, commonly used for revenue, user, or metric growth tracking.
Yes, completely free with unlimited calculations.
Yes, saved locally in your browser only.
Yes, if the new value is more than double the old value.

Related Tools

Also try our Percentage Calculator and Compound Interest Calculator.

Ready to calculate? Enter your two values above — free and instant.

Share Your Experience

Found this tool useful? Have a suggestion or found a bug? Send your feedback directly to us — we read every message.