Percentage Increase Calculator
Find the percent change from one value to another. Detects increase, decrease, or no change.
From / to
Percent change
+25%
Absolute change: +25 (increase)
Frequently Asked Questions about the Percentage Increase Calculator
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, then multiply by 100. Formula: ((new - old) / old) x 100. From 80 to 100, the increase is (20 / 80) x 100 = 25 percent.
What is the difference between percentage increase and decrease?
Both use the same formula. If the result is positive, it is an increase; if negative, it is a decrease. Going from 100 to 80 gives -20 percent, a 20 percent decrease.
Why is the original value the denominator?
Percentage change is always measured relative to the starting point. A $10 jump on a $20 item (50 percent) is huge, but the same $10 jump on a $1000 item (1 percent) is tiny.
Can percentage increase exceed 100 percent?
Yes. If a value more than doubles, the increase exceeds 100 percent. Going from 50 to 200 is a 300 percent increase because the change of 150 is three times the original.
Why does it fail when the old value is zero?
Percentage change divides by the old value, and dividing by zero is undefined. There is no meaningful percentage for going from nothing to something, only an absolute change.