Percentage Calculator
Quickly solve everyday percentage problems. Calculate discounts, margins, and growth instantly in your browser.
Percentage of a Value
20% of 150 is 30
Value to Percentage
30 is 20% of 150
Percentage Change
The change from 100 to 120 is a 20% increase.
Free Online Percentage Calculator
Whether you are calculating a discount while shopping, figuring out a tip, or measuring business growth, this tool provides instant answers.
- Percentage of a Value: Find what a specific percent equals.
- Value to Percentage: Find what percent one number is of another.
- Percentage Change: Calculate the exact growth or decline between two numbers.
- Private & Secure: All calculations happen locally in your browser.
Common Uses
Everyday math made simple:
- Discounts: "What is 15% off $120?"
- Exams/Scores: "I scored 45 out of 60, what is my percentage?"
- Business Growth: "Sales went from 5,000 to 6,200. What is the percentage increase?"
- Taxes & Tips: "What is a 20% tip on a $45 bill?"
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Frequently Asked Questions
To find the percentage of a number, you multiply the number by the percentage fraction. For example, to find 20% of 150, you calculate: 150 × (20 / 100) = 30.
Divide the first number by the second number, then multiply by 100. For example, to find what percentage 30 is of 150: (30 / 150) × 100 = 20%.
Subtract the old value from the new value, divide the result by the old value, and multiply by 100. For example, the change from 100 to 120 is: ((120 - 100) / 100) × 100 = 20%.
No. This percentage calculator works entirely in your web browser. None of your numbers or calculations are ever sent to our servers, ensuring complete privacy and blazing fast performance.