Percentage Change Calculator
Calculate the percentage change between an initial (old) value and a final (new) value. This tool helps you determine the rate of increase or decrease, commonly used for tracking prices, stock performance, population growth, and many other metrics.
Enter values and click calculate.
Formula: Percentage Change = ((New Value - Old Value) / |Old Value|) * 100%
Understanding Percentage Change
Percentage change measures the degree of change over time or between two values. It's expressed as a percentage of the older or initial value.
- A positive percentage change indicates an increase from the old value to the new value.
- A negative percentage change indicates a decrease.
- For example, if a stock price goes from $100 to $120, the percentage change is +20%. If it goes from $100 to $80, the change is -20%.
- This calculation is vital in finance for tracking investment returns, in economics for measuring inflation or GDP growth, and in everyday life for understanding price changes or performance improvements.