Percentage Calculator
Calculate percentages
What is X% of Y?
X is what % of Y?
Percentage Change
Increase/Decrease by %
What Is a Percentage Calculator?
A percentage calculator solves all common percentage problems — finding what percent one number is of another, calculating a percentage of a number, adding or subtracting percentages, and finding percentage increase or decrease. Whether you are calculating tips, grades, tax, or markup, Tooliva's free online percentage calculator gives you instant, accurate results.
Why Use Tooliva's Online Percentage Calculator?
Percentage calculations come up constantly in everyday life — restaurant tips, shopping discounts, exam scores, tax amounts, and business metrics. Tooliva handles all percentage operations in one tool. Enter your values and get the answer instantly. No formulas to remember, no mental math required.
How to Calculate Percentages Online
- Choose the type of percentage calculation you need.
- Enter the values in the input fields.
- The result appears instantly — copy it to your clipboard.
Key Features
- Multiple calculation modes — percentage of, what percent, percentage increase/decrease
- Instant results — answers appear as you type
- Step-by-step explanation — see how the calculation was performed
- Decimal and fraction support — handles both input formats
- Free and private — no sign-up, no uploads, browser-based
Common Use Cases
Students calculate exam scores and grade percentages. diners compute restaurant tips. Shoppers calculate discount percentages. Accountants compute tax amounts and interest rates. Business analysts calculate growth rates, conversion rates, and profit margins.
Frequently Asked Questions
Q: How do I calculate 15% of $200?
Select "percentage of" mode, enter 15 as the percentage and 200 as the number. The result is $30.
Q: How do I find what percent 30 is of 120?
Select "what percent" mode, enter 30 as the part and 120 as the whole. The result is 25%.
Q: Can I calculate percentage increase?
Yes. Enter the original value and new value to see the percentage increase or decrease between them.
Q: Is the calculation private?
Yes. All calculations happen in your browser. No data is sent to any server.