Percentage Increase & Decrease Calculator
Calculate percentage changes between two values instantly. Perfect for financial analysis, price changes, growth measurements, and academic purposes.
Input Values
Calculation Result
Percentage Change
0%
Enter values to calculate
Original Value
0.00
New Value
0.00
Difference
0.00
★ ★ ★ ★ ★
"This percentage calculator saved me hours of work! The visual chart makes it so easy to understand the change between values."
4.9/5 based on 178 reviews
How to Calculate Percentage Change
Percentage change measures the degree of change over time. It's calculated by comparing an original value to a new value.
Percentage Change = [(New Value - Original Value) / |Original Value|] × 100%
Examples:
- Price Increase: Original price $100, new price $120 → (120-100)/100 × 100 = 20% increase
- Population Decrease: Original population 5000, new population 4500 → (4500-5000)/5000 × 100 = -10% (10% decrease)
- Test Score Improvement: Original score 70, new score 84 → (84-70)/70 × 100 = 20% improvement
Key Applications:
- Financial analysis (profit/loss, ROI)
- Sales and marketing performance
- Academic grading and score improvements
- Scientific data interpretation
- Price comparisons and inflation tracking