Percentage Change Calculator
Calculate percentage changes, differences, and solve common percentage math problems. Essential for tracking growth, discounts, and financial analysis.
Calculate Percent Change
Calculate the percentage increase or decrease from an initial value to a final value.
Enter initial and final values to calculate percentage change
Formula & Definition
Measures the relative change from an initial value to a final value. Positive = increase, Negative = decrease.
Compares two values using their average as the baseline. Used when there's no clear "before" or "after".
Calculates a percentage of a given value. Useful for tips, taxes, and discounts.
Finds what percentage one value represents of another. Useful for grades and completion rates.
Real-World Applications
Business & Finance
Calculate revenue growth (Month-over-Month or Year-over-Year) to track company performance. Investors use percentage change to evaluate stock price movements, portfolio returns, and market trends. A 20% increase in quarterly revenue signals strong growth, while a 15% decline may indicate challenges.
Shopping & Discounts
Verify discount claims by calculating the actual percentage off. If an item was $50 and is now $30, that's a 40% discount. This tool helps you compare deals across different retailers and ensure you're getting the best value. Also useful for calculating sales tax or tip percentages.
Personal Finance & Health
Track weight loss progress (e.g., "I lost 10% of my body weight"), monitor savings growth, or calculate interest rate changes. Students can use it to determine grade improvements or test score differences. The percentage difference mode is perfect for comparing two measurements without a clear baseline.