Percentage Calculator
Calculate percentages instantly — find a percentage, compare values, or calculate percentage change.
Frequently Asked Questions
What is the difference between percentage and percentage change?
Percentage expresses a value as a fraction of 100. Percentage change measures how much a value has increased or decreased relative to its original amount.
How is percentage change calculated?
Percentage change = ((New Value − Original Value) / |Original Value|) × 100. A positive result is an increase, a negative result is a decrease.
Can I use negative numbers?
Yes. All three modes handle negative numbers correctly. Percentage change from a negative starting value is calculated using the absolute value of the original.
Is my data stored anywhere?
No. All calculations happen entirely in your browser. Nothing is sent to our servers and nothing is stored.