Percentage Increase Calculator
Enter an original value and a new value to calculate the increase amount and percent change.
Formula used: ((New Value - Original Value) / Original Value) × 100
What is a percentage increase?
A percentage increase tells you how much something has grown relative to its starting point. It is one of the most useful calculations in everyday life because it helps you compare change fairly, whether you are talking about salary growth, rent increases, business revenue, online traffic, or investment returns.
For example, a $50 increase means very different things depending on where you started: going from $100 to $150 is a big jump, but going from $10,000 to $10,050 is very small. Percentage increase solves that by scaling the change against the original value.
Percentage increase formula
The standard formula is:
Percentage Increase = ((New - Original) / Original) × 100
Step-by-step
- Find the difference: New - Original
- Divide by the original value
- Multiply by 100 to convert to a percent
If the result is positive, it is an increase. If it is negative, it is actually a percentage decrease.
Quick examples
Example 1: Salary
Your salary moves from $60,000 to $66,000.
Difference: $6,000
Percentage increase: (6,000 / 60,000) × 100 = 10%
Example 2: Product price
A product increases from $80 to $92.
Difference: $12
Percentage increase: (12 / 80) × 100 = 15%
Example 3: Website visitors
Monthly visitors go from 4,000 to 5,400.
Difference: 1,400
Percentage increase: (1,400 / 4,000) × 100 = 35%
Where people use percentage increase calculators
- Personal finance: tracking raises, savings growth, and debt changes
- Investing: comparing stock gains and portfolio performance
- Business: monitoring sales, profit, ad performance, and customer growth
- Education: test score improvements over time
- Health and fitness: changes in endurance, strength, or training volume
Percentage increase vs. percentage points
This is a common source of confusion. If a conversion rate rises from 10% to 12%, that is:
- +2 percentage points (12% - 10%)
- +20% increase ((12 - 10) / 10) × 100
Both are correct, but they describe different things. Use percentage points when comparing two percentages directly. Use percentage increase when describing relative growth.
Common mistakes to avoid
- Using the new value as the denominator instead of the original value
- Forgetting to multiply by 100
- Confusing a negative result (decrease) with an increase
- Trying to calculate percentage change from an original value of zero (undefined)
How to interpret calculator results
After you calculate, focus on three numbers:
- Original value: your baseline
- Absolute change: raw difference in units or dollars
- Percent change: how large the change is relative to the baseline
This combination gives both context and scale. Absolute numbers tell the concrete amount; percentage tells proportional impact.
Final thoughts
A percentage calculator for increase is simple, but incredibly powerful for better decisions. It helps you compare changes across different sizes and situations without guesswork. Use the calculator above whenever you need a quick, accurate way to measure growth.