Percentage Calculator
The three percentage questions people actually ask, answered at once.
Method
How it works
Enter two values to answer three common percentage questions at once: what A percent of B equals, what percentage A represents of B, and the percentage change from A to B.
The calculator also shows the signed numerical difference. Percentage-of calculations use B as their base, while percentage change uses A as the starting value.
Common questions
Frequently asked questions
Which value is the starting value for percentage change?
Value A is the starting value and Value B is the ending value.
Why does reversing A and B change the percentage?
Percentages depend on the chosen base value, so reversing the values changes the denominator.
What happens when a base value is zero?
Calculations that would divide by zero return zero in this calculator.
Not financial advice. This calculator is for general informational purposes only. Check figures independently before making financial decisions.