Percentage increase calculator
Measure growth from an original value to a higher new value.
What this calculator covers
Use this calculator to measure how much a value grew compared with its original baseline.
It is built for pricing changes, traffic growth, and any other case where users need both the raw increase and the percentage story.
Frequently asked questions
- What is the formula for percentage increase?
- Subtract the original value from the new value to get the raw gain, divide that by the original value, then multiply by 100. Written out: ((new − original) ÷ original) × 100.
- Why is the original value used as the denominator?
- Because percentage increase measures growth relative to where you started. Dividing by the original value answers the question "how large is this gain compared with what I had before?"
- What is the difference between percentage increase and percentage points?
- Percentage increase is a relative measure — it tells you growth as a share of the starting value. Percentage points describe an absolute arithmetic difference between two percentages. For example, a rate climbing from 10% to 15% is a 5 percentage-point increase but a 50% relative increase.
- Can I calculate a decrease with this tool?
- This calculator requires the new value to be at least as large as the original. For scenarios where the value fell, use the percentage decrease calculator instead.
Tool
Run the calculation
Result
RESULT · INCREASE
â„–005
Primary result
25%
Moving from 80 to 100 is a 25% increase.
- Change amount
- 20
- Ending value
- 100
Step-by-step solution
- 1.Subtract the original value from the new value: 100 - 80 = 20.
- 2.Divide the change by the original value: 20 ÷ 80.
- 3.Convert the ratio to a percent: 25%.
Walkthrough
Visual walkthrough
Percentage increase compares the amount of growth to the original baseline.
01
Find the raw increase
100 - 80 = 20
Start by isolating how much the value grew in absolute terms.
02
Compare it to the baseline
20 ÷ 80
The baseline is always the original value because that is what the growth is measured against.
03
Convert to a percent
Turning the ratio into a percent makes the size of the increase easier to compare across different scales.
Increase 25%