Percentage Increase Calculator

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Percentage Increase Calculator

Calculate the percentage change between two values and review the formula beside the answer.

Last updated: March 2026 | By ForgeCalc Engineering

Percentage Increase Solver

Growth calculation

Calculation Steps

1.Initial value: 100
2.Final value: 120
3.Increase = 120 - 100 = 20
4.Formula: (increase / absolute initial) x 100
5.Calculation: (20 / 100) x 100 = 20%
Result
20%

Increase

What Percentage Increase Means

Percentage increase shows how much a value has grown relative to its original amount. It is commonly used in finance, business, and science to compare growth across different scales.

How to Calculate Percentage Increase

  1. Subtract the initial value from the final value.
  2. Divide by the absolute value of the initial value.
  3. Multiply by 100.
  4. Read the result as a percentage increase or decrease.
increase = ((final - initial) / |initial|) x 100

Worked Example

Example: 100 to 120 is a 20% increase.

(120 - 100) / 100 x 100 = 20%

Frequently Asked Questions

Can percentage increase be negative?

Yes. A negative result means the final value is lower than the initial value.

What if the initial value is zero?

The calculation is undefined because you cannot divide by zero.

Does this accept decimals?

Yes. Any finite real numbers are accepted.

Is this the same as markup?

Markup is a practical form of percentage increase applied to a cost price.

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