Percent Increase Calculator
Calculate percent increase between two numbers instantly. Great for prices, revenue, salary changes, trading moves, and everyday math.
Enter your numbers
Compare the starting value to the ending value.
Result
Your percent change and raw difference.
Percent increase
20%
Difference
20
Moving from 100 to 120 is a 20% increase.
How to use the percent increase calculator
Enter any starting value in the first field and your ending value in the second field. The calculator instantly shows the percentage change between the two numbers and the raw difference. If the ending value is higher than the starting value, the result is a percent increase. If it is lower, you get a percent decrease — the calculator handles both directions automatically. You can use it with prices, salaries, revenue figures, scores, quantities, or any other numeric data.
How the percent increase calculator works
The formula is: Percent Change = ((Ending Value − Starting Value) ÷ Starting Value) × 100. For a stock that goes from $50 to $65: (($65 − $50) ÷ $50) × 100 = (15 ÷ 50) × 100 = 30% increase. If the result is negative, the value decreased by that percentage. The raw difference ($15 in this example) is shown alongside the percentage so you can see both the relative and absolute change. Note that a 50% increase followed by a 50% decrease does not return to the starting value — these operations are not symmetrical.
When to use this calculator
Percent increase calculations come up constantly in finance, business, and everyday life. Use this calculator to track how much a stock or crypto position has gained since you bought it; to calculate the percentage raise in a salary negotiation (from your current pay to the offered amount); to measure year-over-year or month-over-month revenue growth for reporting; to track fitness improvements like lifting more weight or running faster; to see how much a property has appreciated in value; or simply to compare two prices and understand how much more expensive one is than the other.
Frequently asked questions
Is “percent increase” the same as “percent change”?
Percent increase refers specifically to cases where the new value is higher. Percent change is the general term covering both directions. This calculator shows both — if the ending value is lower, the result will be labeled “decrease” and the percentage will be negative.
What if my starting value is zero?
Percent increase from zero is mathematically undefined because division by zero is impossible. The calculator returns 0 in this case. If you are measuring growth from a zero baseline — like a new product that had no sales last month — use absolute values instead of percentage growth.
How do I reverse a percent increase to find the original value?
Divide the final value by (1 + percent ÷ 100). If a price is $138 after a 15% increase: $138 ÷ 1.15 = $120 original price. This reversal formula is useful for working out pre-tax prices, pre-inflation values, or original purchase prices.
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