Math calculator

Percentage Change Calculator

Calculate the percent increase or decrease between an old and new value.

FormulaChange % = (new value - old value) / old value x 100

Formula

Percentage change formula

Change % = (new value - old value) / old value x 100

A move from 80 to 100 is a 25% increase.

FAQ5 common questions for this calculator.

FAQs

What is the percentage change formula?+

Subtract old from new, divide by the old value, then multiply by 100.

How does the Percentage Change Calculator calculate the result?+

For the Percentage Change Calculator, it uses the Percentage change formula: Change % = (new value - old value) / old value x 100. A move from 80 to 100 is a 25% increase.

What information do I need to use the Percentage Change Calculator?+

For the Percentage Change Calculator, enter the known quantities requested by the calculator and use the units implied by the Percentage change formula. If a value is unknown, choose a calculator that solves for that specific variable.

How accurate is the Percentage Change Calculator?+

Percentage Change Calculator is mathematically reliable for the entered values and selected operation. It follows the Percentage change formula. Rounding, order of operations, and undefined cases can still affect interpretation.

What should I check before using the Percentage Change Calculator result?+

For the Percentage Change Calculator, check the input values, operation order, rounding precision, and undefined cases before using the result. Compare one changed value at a time when testing scenarios.

RelatedNearby math calculators for the next step after Percentage Change Calculator.

Math calculators to compare next

Percentage CalculatorMathDecimal to Percent ConverterMathDistance Formula CalculatorMathMidpoint CalculatorMathAverage CalculatorMathFraction to Percent ConverterMathLogarithm CalculatorMathPercent to Fraction ConverterMathCircle CalculatorMath

Math guide

How to use the Percentage Change Calculator

Calculate the percent increase or decrease between an old and new value. The page also explains the percentage change formula and shows a practical example: A move from 80 to 100 is a 25% increase.

  1. 1

    Enter your details

    Enter the values for the percentage change calculator scenario you want to check.

  2. 2

    Check the calculation

    Review the result alongside the percentage change formula: Change % = (new value - old value) / old value x 100.

  3. 3

    Compare scenarios

    Change one or more inputs to see how they affect the percentage Change Calculator result before you use the estimate.