Prices rise, marks fluctuate, and metrics shift. Our percentage change calculator tells you instantly and precisely how much something has increased or decreased — in percentage terms — so you can analyse performance and trends with confidence.
What is a Percentage Change Calculator?
A percentage change calculator measures the relative difference between an old value and a new value, expressed as a percentage. A positive result indicates growth or increase; a negative result indicates a decrease or decline. It's widely used in finance, economics, science, and everyday comparisons.
Formula
% Change = ((New Value − Old Value) / |Old Value|) × 100
A positive result = increase. A negative result = decrease.
Example Calculation
- Stock price went from ₹150 to ₹180: % Change = ((180-150)/150) × 100 = +20%
- Petrol price dropped from ₹106 to ₹96: % Change = ((96-106)/106) × 100 = −9.43%
- Salary from ₹45,000 to ₹54,000: % Change = +20%
How to Use This Calculator
- Enter the Original Value (the starting number).
- Enter the New Value (the end number after change).
- Click Calculate to see the percentage change and direction.
Real Life Use Cases
- Portfolio Analysis: Track how much a stock or mutual fund has gained or lost.
- Exam Comparison: Compare scores between two terms to identify improvement.
- Price Tracking: Monitor how grocery prices have changed month-over-month.
- Business Metrics: Measure monthly revenue growth, app download changes, or customer count changes.
FAQs
Is percentage change the same as percentage difference?
No. Percentage change tracks movement from a defined start point. Percentage difference measures the gap between two numbers without a clear "before" and "after."
Can percentage change exceed 100%?
Yes! If a value doubles, the percentage change is 100%. If it triples, it's 200%. There's no upper limit to percentage increase.
Common Use Cases for Percentage Change Calculator
- Use this Percentage Change Calculator for quick, accurate online calculations — no app needed
- Ideal for students, professionals, and anyone planning finances or health goals
- Get instant results right in your browser — 100% private, no data stored
- Bookmark this page to use the Percentage Change Calculator anytime, on any device