Power Calculators

📈 Percentage Change Calculator

Calculate the percentage change from an original value to a new value, including the signed increase or decrease.

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Enter details

Enter the starting value.
Enter the ending value.

Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Percentage Change

Percentage change shows how much a value has changed relative to its original value.

A positive percentage change represents an increase. A negative percentage change represents a decrease.

🧮 Formula

Absolute change
Change = New − Original
Percentage change
Percentage change = (New − Original) ÷ Original × 100

Where

  • Original = starting value
  • New = ending value
  • Change = New − Original
The original value is the reference value and should not be zero for a meaningful percentage change.

✏️ Worked examples

Value rises from 100 to 120

You enter
Original Value100
New Value120
You get
Change20
Percentage Change20.00%
Absolute Percentage Change20.00%

The value changes by 20, or 20.00%.

Try this example →

Value falls from 200 to 150

You enter
Original Value200
New Value150
You get
Change-50
Percentage Change-25.00%
Absolute Percentage Change25.00%

The signed percentage change shows the decrease.

Try this example →

🧭 How to use this calculator

What you enter

  • Original ValueEnter the starting value.
  • New ValueEnter the ending value.

What you get

  • Change
  • Percentage Change
  • Absolute Percentage Change

💡 Important note

  • The original value is the denominator.
  • A zero original value does not have a meaningful percentage change.
  • The signed result distinguishes increases from decreases.

❓ Frequently asked questions

What is percentage change?

It is the difference between the new and original values divided by the original value, multiplied by 100.

What does a negative percentage change mean?

It means the new value is lower than the original value.

Is percentage change the same as percentage difference?

No. Percentage change uses the original value as the reference, while percentage difference uses the average magnitude of the two values.