About This Tool
Calculate percentages quickly with multiple calculation modes. Find what percent one number is of another, calculate percentage increase or decrease, and solve common percentage problems used in finance, shopping, and academics.
How to Use
Select the type of percentage calculation you need from the tabs.
Enter your numbers in the input fields.
The result updates automatically as you type — no need to click a button.
Copy the result or use it in your work.
Frequently Asked Questions
How do I calculate a percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) × 100. For example, going from 50 to 75 is a 50% increase: ((75-50)/50) × 100 = 50%.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 25 is 50% of 50: (25/50) × 100 = 50%.
What is the difference between percentage increase and percentage points?
Percentage increase is relative to the original value, while percentage points are an absolute difference. Going from 10% to 15% is a 50% increase but only 5 percentage points.