Percentage Change Calculator
Use this percentage change calculator to enter an old value and a new value and instantly see the percentage change. No buttons to press — results update automatically.
Increase
Calculation:
This percentage change calculator uses: ((180.00 - 77.00) / |77.00|) × 100% = 133.77%
💡 Tip: Placeholder values show typical numbers – just overwrite them. Results update automatically.
About Percentage Change
A percentage change calculator measures the relative change between an old value (V₁) and a new value (V₂). This calculator follows the standard formula:
Percentage Change = ((V₂ - V₁) / |V₁|) × 100%
A positive result indicates an increase, while a negative result indicates a decrease.
Real‑World Examples
- Stock price: $200 dropped to $180 → ((180-200)/200)×100% = -10% (a 10% decrease).
- Salary raise: $50,000 increased to $55,000 → +10%.
- Revenue growth: $1.2M this year vs $1.0M last year → +20%.
Frequently Asked Questions
Can the percentage change be more than 100%?
Yes, if the new value is more than double the old value. For example, from 100 to 300 is a 200% increase.
What if the old value is zero?
The change is undefined when the old value is zero. Our percentage change calculator will show "N/A" in that case.
How is this different from percentage difference?
Percentage change compares an old and new value (directional). Percentage difference compares two values symmetrically, ignoring direction. Use the Percentage Difference Calculator for symmetric comparison.