Percentage Change Calculator to Calculate Percent Increase or Decrease

Percentage Change Calculator Sign

This calculator will calculate the numerical difference, percent difference, fractional change, and percent change from one number to another.

Plus, unlike the majority of online percentage calculators, this calculator allows you to choose the decimal rounding, explains how it arrived at the given result and shows a visual representation of the result in a bar chart.

Note that if you would like to calculate what percent one number is of another, or calculate numbers from a percentage, please visit the Percent Calculator.

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Percentage Change Calculator

Calculate percent increase or decrease from one number to another.

Special Instructions

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Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Round to:Decimal places:Decimal places to round to:Number of decimal places to round result to:

Number of decimal places to round result to:

Select how many decimal places you would like the percentage change result rounded to. Note that the calculator will always give the raw result in the field provided, and then use the rounded version for the result explanation and the pie chart.

Begin #:Beginning #:Beginning number:Beginning number:

Beginning number:

Enter the beginning or past number, without non-numerical characters (commas, dollar signs, percent signs, etc.).

End #:Ending #:Ending number:Ending number:

Ending number:

Enter the ending or current number, without non-numerical characters (commas, dollar signs, percent signs, etc.).

# difference:Numerical diff:Numerical difference:Numerical difference:

Numerical difference:

This is the absolute value of the difference between the beginning number and the ending number.

% difference:Percent diff:Percentage difference:Percentage difference:

Percentage difference:

This is the percentage difference between the two entered numbers (not the same as percentage change).

Frac chg:Fractional chg:Fractional change:Fractional change:

Fractional change:

This is the difference of the beginning and ending numbers, over the beginning number.

% change:Percent change:Percent change:Percent change:

Percent change:

This is the rounded version of the result derived from calculating percent change.

If you would like to save the current entries to the secure online database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

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Help and Tools


How to calculate percentage change.

How to Calculate Percent Change

The formula used for calculating the percent increase or decrease is as follows:

Percentage Change Formula

% Change=(V2 - V1)100

Where V1 is the starting number and V2 is the ending number

Percentage Increase Example

To see how the percent change formula works, let's suppose you wanted to calculate the percent change in the cost of attending college from the previous year. If the tuition last year was $5,000, and tuition this year is $5,500, here is how you would calculate the percent increase in college tuition:

Calculate Percent Change from 5000 to 5500

% Chg.=(5500 - 5000)100

% Chg.=(500)100

% Chg.=0.10 * 100

Change=10% Increase

Percentage Decrease Example

On the other hand, let's suppose tuition last year was $5,500, and tuition this year is $5,000 (I know, wishful thinking), here is how you would calculate the percent decrease in college tuition:

Calculate Percent Change from 5500 to 5000

% Chg.=(5000 - 5500)100

% Chg.=(-500)100

% Chg.=-0.0909 * 100

Change=-9.09%, or a 9.09% Decrease

If you are wondering why a 500 increase results in a higher percentage change (10%) than a 500 decrease (9.09%) in the above example, it's because the denominator in the percentage change formula is always greater in the case of a percentage decrease (higher of the two numbers is the divisor).

I hope my explanation has solidified your understanding of how to calculate percent change. If not, please use the feedback form beneath the calculator to let me know what questions I have left unanswered.

Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.