Percentage Change Calculator
Calculate percentage increase or decrease between two numbers. Free, fast, and accurate.
Percentage Change
Calculate increase or decrease between two numbers
Table of Contents
About
The Percentage Change Calculator measures how much a value has increased or decreased relative to its original value. Track stock prices, sales growth, weight loss, or any change over time with precise percentage calculations.
How to Calculate Percentage Change
Percentage change measures how much a value has increased or decreased relative to its original value.
((New Value - Old Value) ÷ Old Value) × 100 = Percentage Change
A stock went from $100 to $125.
- Find the difference: $125 - $100 = $25
- Divide by the original value: $25 ÷ $100 = 0.25
- Multiply by 100: 0.25 × 100 = 25%
- The answer is a 25% increase
Our calculator above automates this process. Simply enter the old and new values and the result appears instantly with a full step-by-step breakdown.
Real-World Examples
Salary Increase
Your salary went from $55,000 to $62,000. Enter 55000 and 62000. Increase: 12.73%.
Weight Change
You weighed 195 lbs and now weigh 178 lbs. Enter 195 and 178. Change: -8.72% (decrease).
Fuel Efficiency
Your car's mileage improved from 28 to 32 mpg. Enter 28 and 32. Improvement: 14.29%.
Price Drop
A laptop price dropped from $1,200 to $899. Enter 1200 and 899. Discount: -25.08%.
Energy Savings
Your electricity bill went from $180 to $145. Enter 180 and 145. Savings: -19.44%.
Conversion Rate
Your website conversions went from 3.2% to 4.1%. Enter 3.2 and 4.1. Improvement: 28.13%.