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Percentage change calculator.
How much did a value increase or decrease? Type your old and new values.
Frequently asked questions.
What is percentage change?
Percentage change measures how much a value has increased or decreased relative to its original value, expressed as a percentage.
What is the formula for percentage change?
Percentage Change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result means an increase; negative means a decrease.
Can percentage change exceed 100%?
Yes. If a value doubles, the percentage change is 100%. If it triples, it's 200%. There is no upper limit.
What if the old value is zero?
Percentage change is undefined when the old value is zero, since dividing by zero is mathematically impossible.
Is percentage change the same as percentage difference?
No. Percentage change is directional (old to new), while percentage difference compares two values without implying which came first.
How do I calculate a 30% increase from 200?
Use the reverse: 200 × (1 + 30/100) = 200 × 1.3 = 260. Our Percentage Increase / Decrease calculator handles this directly.
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