Math
Percentage Change Calculator
Calculate absolute change and percentage increase or decrease between an original value and a new value.
+250
Absolute Change
+25.00%
Percentage Change
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Frequently Asked Questions
Quick answers to common questions
How do you calculate percentage change?+
Percentage Change = ((New Value − Old Value) / Old Value) × 100. A positive result is an increase; negative is a decrease.
What is absolute change?+
Absolute change is simply New Value minus Old Value, without converting to a percentage.
Can old value be zero?+
Percentage change is undefined when the original value is zero because you cannot divide by zero.
Is my data private?+
Yes. All calculations run locally in your browser.