Free Online Percentage Calculator
Calculate percentages quickly and accurately with our free online tool. Whether you need to find what percentage one number is of another, or calculate a specific percentage of a number, we've got you covered.
How to Use
Mode 1: Enter a percentage (e.g., 20) and a number (e.g., 150) to find out what 20% of 150 is.
Mode 2: Enter a part number and a total number to find out what percentage the part is of the total.
Results are displayed with two decimal precision for accuracy.
Common Percentage Calculations
- Discounts: Calculate sale prices (e.g., 25% off $80)
- Tips: Determine tip amounts at restaurants
- Grades: Convert test scores to percentages
- Statistics: Find what percentage a value represents
- Growth: Calculate percentage increase or decrease
Formula Reference
Find percentage of a number:
Result = (Percentage ÷ 100) × Number
Example: 15% of 200 = (15 ÷ 100) × 200 = 30
Find what percentage one number is of another:
Result = (Part ÷ Total) × 100
Example: 25 is what % of 200 = (25 ÷ 200) × 100 = 12.5%
Why Use This Tool?
No more mental math or figuring out which formula to use. Our dual-mode calculator handles both common percentage scenarios instantly. All calculations happen locally in your browser - fast, private, and accurate.