Percentage Calculator
Three everyday percentage questions in one tool.
Result 30
Formula
- A% of B = A ÷ 100 × B
- A as % of B = A ÷ B × 100
- % change = (B − A) ÷ A × 100
Frequently asked questions
How do I calculate a percentage increase?
Subtract the old value from the new one, divide by the old value and multiply by 100.