Percentage Increase Calculator
Calculate percentage increase between two numbers. Useful for price increases, growth rates, salary raises, and comparisons.
All calculations run locally in your browser. No data is stored.
How it works
Percentage increase formula: ((new − old) ÷ old) × 100
- Step 1: Subtract the old value from the new value.
- Step 2: Divide the difference by the old value.
- Step 3: Multiply by 100 to get the percentage.
Examples
- Old 80 → New 100 → Increase = 25%
- Old 50 → New 60 → Increase = 20%
- Salary 40,000 → 44,000 → Increase = 10%
- Price 120 → 150 → Increase = 25%
FAQ
- What if the old value is 0?
Percentage increase is undefined because it would require division by zero.
- Can the result be negative?
Yes. If the new value is smaller than the old value, the result represents a decrease, not an increase.
- Is this the same as percentage change?
Percentage change can represent either an increase or a decrease. This tool uses the increase formula and may return a negative result if the new value is smaller.
- Why is my result very large?
When the old value is very small, even a small absolute difference can create a large percentage increase.
- Is this accurate?
Yes. It uses the standard mathematical formula for percentage increase.