Percentage Calculator is a free tool to help you calculate percentage change and other common calculations.

Just enter your values and hit Enter or click calculate.

What is X% of Y

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X is what % of Y

is what percent 



Percentage change, increase, or decrease calculator

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How To Calculate Percentage Change

It's easy to calculate percentage change, but calculators like this one can save you time spent in mental maths. You calculate percentage change by understanding the difference between your new value and your current value. Then, divide this number by your original value. You'll end up with a decimal which you can multiply by 100 to get your percentage change.

Percentage Change Formula For Excel

To calculate percentage change in Excel, with your original value in A1 and your new value in B1:  =((B1 - A1) / A1) * 100 . Simply copy and paste this formula into your formula bar, and edit the cell references if needed.

Percentage Increase Formula

You can calculate percentage increase or decrease with the formula increase ÷ starting number × 100. The result will be either a positive or negative value, indicating an increase or decrease respectively.