Percent Change Calculator
Compare any two numbers and instantly see the percent change between them. Useful for analyzing shifts in prices, scores, metrics, or any pair of values over time.
Percent Change from A to B
Find the percent change when moving from value A to value B — ideal for comparing prices, scores, or statistics.
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Enter values above to see the result.
When to Use the Percent Change Calculator
The percent change formula lets you compare the relative difference between two numbers, regardless of their scale. Unlike a simple subtraction, it tells you how meaningful the difference is as a proportion of the starting point.
- Comparing product prices: See how much more (or less) one item costs compared to another.
- Academic scores: Compare test scores from two semesters — did you improve by 12%?
- Sports statistics: Measure changes in a player's performance between seasons.
- Scientific data: Evaluate how an experimental group differs from a control group in percentage terms.
- Market analysis: Track how a stock price, index, or metric has moved between two dates.
Formula: Percent Change = ((Value B − Value A) / |Value A|) × 100. The result is positive when B is greater than A (an increase) and negative when B is less (a decrease).