Enter a starting number and a new number to find the percentage increase between them — the formula is shown with every result.
How to Use This Calculator
- Enter the starting number and the new number.
- Click Calculate percentage increase.
- Read the percentage change and the formula used.
Try this: starting number 100 and new number 150 gives a 50% increase.
If a number is missing, you will see a message asking you to enter both numbers.
Percentage increase vs. percentage points: these are not the same thing. A rise from 20% to 25% is a 25% increase, but only a 5 percentage-point increase. Percentage increase measures relative change; percentage points measure the plain difference between two percentages.
Frequently Asked Questions
What is the percentage increase formula?
Percentage increase = ((New number − Starting number) ÷ Starting number) × 100. This calculator shows the formula filled in with your numbers.
What happens if the starting number is zero?
The result is shown as “undefined (cannot divide by zero)”, because the formula would require dividing by zero.
Can this calculator show a percentage decrease?
Yes. If the new number is smaller than the starting number, the result is a negative percentage, which represents a percentage decrease.