Percentage Calculator
Various percentage calculations and conversions.
Percentage Calculator
Calculation History
No calculations yet
Percentage Calculations
- • Calculate percentage of total
- • Find percent change
- • Convert percent to decimal
- • Convert decimal to percent
Common Uses
- • Calculate discounts and markups
- • Determine growth rates
- • Convert between formats
- • Financial calculations
Privacy & Features
- • 100% client-side calculations
- • No data sent to servers
- • Calculation history
- • Works offline
About the Percentage Calculator
The Percentage Calculator handles the everyday percentage questions that trip people up: what is X% of Y, what percent one number is of another, and percentage increase or decrease. It removes the mental math and the risk of error.
Percentages are everywhere — discounts, tips, tax, grades, and changes over time — and getting them right matters. A dedicated calculator answers these questions instantly and correctly, so you can shop, budget, or analyze with confidence.
Everything runs in your browser with no upload or account. Enter your numbers and read the answer immediately.
How to use the Percentage Calculator
- Choose the type of percentage calculation you need.
- Enter the values involved.
- Calculate the result.
- Read the answer (a value, a percentage, or a change).
- Use it for your discount, tip, or analysis.
Common use cases
- Working out a discount or sale price.
- Calculating a tip or tax amount.
- Finding what percentage one number is of another.
- Measuring a percentage increase or decrease.
Frequently asked questions
What kinds of percentage problems can it solve?
It covers finding a percentage of a number, what percent one value is of another, and percentage increase or decrease between two values.
How do I calculate a discount?
Find the percentage of the original price, then subtract it — or use the increase/decrease mode to get the final price directly.
What’s the difference between percent change and percentage points?
Percent change is relative to the starting value, while percentage points are an absolute difference between two percentages. They’re easy to confuse, so define which you need.
Is anything uploaded?
No. Calculations run in your browser, so nothing leaves your device.
Can it do more advanced math?
For trigonometry, logs, and powers, use the Scientific Calculator.