Percentage Change Calculator — math calculators and step-by-step solvers
The Percentage Change Calculator shows how much a value increased or decreased compared with an earlier value, as a percentage. Enter an old value and a new value to see the difference expressed as a growth or decline rate. Use it for prices, scores, salaries, or any before-and-after comparison.
Category: Mathematics
About this tool
What Is Percentage Change Calculator? Percentage Change Calculator is a browser-based tool for Calculate percentage increase or decrease between two values. This guide explains the result, the calculation or processing method, and correct usage. Calculation or Processing Method Enter the baseline and new values, then interpret a positive result as growth and a negative result as decline. Formula or method: Percentage change = (new value − old value) / old value × 100. How to Use It Open the tool and choose the required unit, mode, or options. Enter values or paste text into the input fields. Review the result, copy it, or continue with a related tool. Important Notes Use consistent units and verify values before calculating. Incomplete or invalid input can produce an incomplete result. Related Tools Tools that support the same workflow: Basic Calculator — Full-featured basic calculator with history. Percentage Calculator — Calculate percentages, increases, decreases easily. Date Difference Calculator — Calculate the exact difference between two dates. Frequently Asked Questions How does Percentage Change Calculator work? Enter the baseline and new values, then interpret a positive result as growth and a negative result as decline. What formula does Percentage Change Calculator use? Percentage change = (new value − old value) / old value × 100. Are Percentage Change Calculator r