Percentage Calculator
Enter two numbers and see the three percentage answers people usually need, all at once.
How it works
A% of B = A × B ÷ 100. A as a share of B = A ÷ B × 100. Change from A to B = (B − A) ÷ A × 100. With A = 20 and B = 80: 20% of 80 is 16, 20 is 25% of 80, and going from 20 to 80 is a rise of 300%.
Questions
What does a negative change mean?
It means B is smaller than A, so the value fell.
What happens if A or B is zero?
A percentage of zero cannot be worked out, so those answers show 0.
Can I use decimals?
Yes. You can type decimal numbers in both boxes.
Results are estimates for planning. They are not tax, legal or financial advice.
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