Percentage Incrase Calculator
Enter your starting value and ending value to calculate the amount of change and the percentage increase (or decrease).
How this percentage incrase calculator works
A percentage increase tells you how much a value has grown compared to where it started. This calculator compares two numbers and returns:
- The absolute change (ending value minus starting value)
- The percentage change
- Whether the result is an increase, decrease, or no change
Percent increase formula
The standard percentage change formula is:
((New Value - Old Value) / Old Value) × 100
If the result is positive, you have a percentage increase. If it is negative, it is a percentage decrease. If the result is zero, there is no change.
Quick example
Suppose your monthly revenue goes from 2,000 to 2,500.
- Change = 2,500 - 2,000 = 500
- Percentage change = (500 / 2,000) × 100 = 25%
That means revenue increased by 25%.
When to use a percentage increase calculator
This tool is useful for everyday personal and professional decisions, including:
- Salary raise calculations
- Price comparisons in shopping or procurement
- Business growth tracking (sales, subscribers, traffic)
- Investment performance checks
- Budget or expense trend analysis
Common mistakes to avoid
1) Mixing up old and new values
Always place the original number in the starting value field and the updated number in the ending value field. Reversing them flips the sign and changes interpretation.
2) Confusing percentage points with percent change
Going from 10% to 15% is an increase of 5 percentage points, but a 50% percent increase. These are not the same thing.
3) Dividing by the wrong base
Percentage increase uses the old value as the denominator. Dividing by the new value produces the wrong result.
FAQ
What if my result is negative?
A negative result means the value decreased. The calculator clearly labels it as a percentage decrease.
Can I use decimals?
Yes. The calculator supports decimal values, so it works for prices, rates, measurements, and financial figures.
Why can’t the starting value be zero?
Because percentage change divides by the starting value. Division by zero is undefined, so a valid non-zero starting value is required.
Final tip
Percentage change is one of the fastest ways to understand growth. Use this percentage incrase calculator whenever you need a clear, accurate comparison between an old number and a new number.