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Percentage change calculator
How much a number rose or fell as a percentage, with percentage points and percentage difference explained. Free, with no account or uploads.
Work out a percentage increase or decrease
Type the old value and the new one. The change is measured against the old value, with the working shown.
From to
Percent change
+25%
From 80 to 100 is a rise of 25%.
How it is worked out
- Take the old value from the new: 100 − 80 = 20
- Divide by the old value: 20 ÷ 80 = 0.25
- Multiply by 100: 25%
- The percentage difference, which has no before and after, is about 22.22%: the gap divided by the average of the two.
Answers that do not end are rounded to this many places, halves up.
Worked out exactly on your device, rounded only to show it. Nothing you type is sent anywhere.
A little help along the way
Follow these steps. Every option is explained underneath. Everything is worked out in your browser; nothing is sent anywhere.
- Say what you want to work outA percentage of a number is the usual. The others are what percent one number is of another, a change, adding or taking off a percentage, the number before a percentage, and marks.
- Fill in the numbersType them into the sentence. You can type 1,250, ₹85, 12.5% or even 1/3.
- Read the answer and the workingThe answer is said in a sentence, with the steps on your own numbers and a grid of 100 squares.
Questions people ask
- How do you work out a percentage change?
- Take the old value from the new one, divide by the old value and multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25%. The page shows these steps with your own numbers.
- What is the difference between percent and percentage points?
- When both numbers are percentages, such as an interest rate going from 4% to 5%, the plain difference is 1 percentage point, while the change measured against 4% is 25%. Turn on “The numbers are percentages” under More options and both are said.
- Is percentage change the same as percentage difference?
- No. Percentage change has a before and an after and is measured against the before. Percentage difference compares two values with neither first, against their average; the page gives it under the answer.
This page is the Percentage calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the Percentage calculator's own page.
Read the step-by-step guide