Calculators
Percentage Increase Calculator
Calculate percentage increase or decrease instantly with this free online calculator.
Result
Increase: 20%
Original Value
100
New Value
120
Difference
20
Formula
((New Value - Original Value) / Original Value) × 100
Usage guide
Percentage increase formula, examples, and common uses
Use this calculator when you need to compare an original value with a new value and explain the change as a percentage. It is useful for prices, salaries, traffic, sales, test scores, and growth reports.
How to use Percentage Increase Calculator
- 1.Enter the original value before the change.
- 2.Enter the new value after the change.
- 3.The tool subtracts the original value from the new value, divides by the original value, and multiplies by 100.
- 4.A positive result is an increase. A negative result is a decrease.
Examples
- Old value 80, new value 100 → 25% increase.
- Old value 120, new value 90 → 25% decrease.
- Old value 1,000, new value 1,250 → 25% increase.
Limitations and notes
- The original value cannot be zero because percentage change requires dividing by the original value.
- For comparing two values without treating one as the starting point, use a percentage difference calculator instead.
What is the percentage increase formula?
Percentage increase = ((new value - original value) / original value) × 100.
Can this also calculate percentage decrease?
Yes. When the new value is lower than the original value, the result is shown as a decrease.
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Why calculate percentage change
A percentage increase calculator helps you measure how much a value has risen or fallen compared with its original amount.
This is useful for prices, salaries, revenue, grades, population changes, and many other comparisons.
It turns a raw difference into a percentage, which makes changes easier to understand.
The same concept also works for decreases when the new value is lower than the original value.
This makes the tool useful for both business and personal calculations.
Common uses for a percentage increase calculator
- Checking price changes
- Measuring salary increases
- Calculating revenue growth
- Finding percentage decrease
- Comparing old and new values clearly
Common percentage change examples
How this percentage increase calculator works
This calculator compares an original value and a new value to find the percentage change between them.
It can show both percentage increase and percentage decrease depending on whether the new value is higher or lower.
You can use it for prices, salary changes, growth rates, discounts, business reports, and everyday math.
Frequently Asked Questions
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, and multiply by 100.
Can this tool calculate percentage decrease too?
Yes. If the new value is lower than the original value, the calculator will show the percentage decrease.
Is this percentage increase calculator free to use?
Yes. Tool Nova provides this percentage increase calculator online for free with no sign-up required.
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