Percentage Increase Calculator
Calculate the percentage increase from an original value to a new, larger value. Standard formula used for raises, price hikes, and growth metrics.
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How this works
% Increase = ((New − Original) ÷ Original) × 100Subtract the original from the new value, divide by the original, then multiply by 100. If the result is negative, the value actually decreased — so a "percentage increase" of −10% really means a 10% decrease. For values that can go either direction, the percentage change formula is conceptually the same and handles both.
Examples
Salary raise
Your salary goes from $65,000 to $72,800. Increase = (72,800 − 65,000) ÷ 65,000 = 0.12 = 12%. This is the standard way HR departments and compensation benchmarks report raises — always expressed as a percent of the original salary.
Rent hike
Your rent rises from $2,400 to $2,640. Increase = (2,640 − 2,400) ÷ 2,400 = 0.10 = 10%. Most US jurisdictions limit annual rent increases; knowing the exact percentage tells you whether your landlord is compliant with local rent control caps.
Product price increase
A subscription goes from $9.99/mo to $12.99/mo. Increase = (12.99 − 9.99) ÷ 9.99 = 0.3003 = 30%. Price increases above 20% typically require a clear customer communication strategy because they cross the psychological threshold where users actively reconsider.
Compound increases
Three consecutive 5% increases do not add up to 15%. Multiply the growth factors: 1.05 × 1.05 × 1.05 = 1.157625, or a 15.76% total increase. This is why inflation of "just 5% per year" compounds into a 63% price rise over 10 years.
Common questions
Percent increase = ((New − Original) ÷ Original) × 100. Take the difference between the new and original values, divide by the original, and multiply by 100 to express the result as a percent.
The formula returns a negative number, which represents a percent decrease. If you know in advance the value went down, use the percent decrease formula: ((Original − New) ÷ Original) × 100. The math is symmetric but the sign convention is clearer when you match the formula to the direction.
They use the same formula, but "change" is direction-neutral (positive or negative) while "increase" implies the new value is larger. Use "change" when you do not know which direction the value moved; use "increase" when you expect growth.
Yes. Any time the new value is more than double the original, the increase exceeds 100%. Going from 50 to 200 is a 300% increase. For very large increases it is often clearer to express the change as a multiplier — "4× growth" reads more naturally than "300% increase" to most readers.
Multiply the original by (1 + percent/100). A 7.5% increase on $80 gives 80 × 1.075 = $86. To go in reverse — knowing the new price and the percentage to find the original — divide: $86 ÷ 1.075 = $80.
No. All calculations happen in your browser. Nothing you type is sent to a server. Your calculation history is stored locally and can be cleared any time.