The values and percentages you enter stay in your browser. Increase calculations run locally without uploading business, price, salary, or growth data.
How to Use the Percentage Increase Calculator
- Choose whether to increase a value by a known percentage or measure growth between two values.
- Enter the non-negative starting value.
- Enter the percentage to apply or the higher ending value.
- Review the final value, increase amount, percentage, and multiplier.
How Percentage Increases Work
To increase a value by a known percentage, multiply the starting value by 1 plus the percentage written as a decimal. A 15% increase uses a multiplier of 1.15. To measure an increase, subtract the starting value from the ending value, divide by the starting value, and multiply by 100.
Apply formula: final value = starting value x (1 + percentage / 100). Measure formula: percentage increase = (ending value - starting value) / starting value x 100.
Percentage Increase Examples
Increase 200 by 15%
Fifteen percent of 200 is 30. Add 30 to 200, or multiply 200 by 1.15, to get a final value of 230.
Measure the increase from 80 to 100
The numeric increase is 20. Divide 20 by the starting value of 80 and multiply by 100. The percentage increase is 25%, and the ending value is 1.25 times the start.
Increase 0 by 50%
Applying a 50% increase to zero still produces zero because 0 x 1.5 = 0. Measuring growth from zero to a positive value is different: the ordinary percentage-increase formula is undefined because it would divide by zero.
Why Repeated Increases Compound
Two consecutive 10% increases produce a total increase of 21%, not 20%. Starting from 100, the first increase gives 110 and the second adds 11, producing 121. Each percentage applies to the value at that step.
Percentage Increase vs. Percentage Points
When a rate moves from 20% to 25%, it rises by 5 percentage points. Relative to the original 20% rate, that is a 25% percentage increase. Use percentage points for the direct difference between rates and percentage increase for relative growth.
When to Use Percentage Change Instead
This tool is focused on non-negative values that rise or have an increase applied. Use the Percentage Change Calculator when the ending value is lower, when you need a signed decrease, or when the values can be negative.