About the percentage calculator
Percentages appear everywhere: discounts, grades, growth, taxes. Enter two numbers to get all three answers at once.
Formula used
A% of B = A×B/100; A is what % of B = A/B×100; Change A→B = (B−A)/A×100.
How to use
Fill in the fields above and the results update instantly. Change any value to compare scenarios. Results are estimates for planning and education and may differ from figures provided by banks, tax offices or doctors.
Frequently asked questions
How do I increase a number by a percent?
Multiply by (1 + percent/100).
What if A is zero?
Percent change from zero is undefined.