Basic Percentage Calculator - What is X% of Y?
Help
Calculate the percentage value of a given number.
Practical Uses
- Daily Nutritional Value:
40% [X] of a standard US 2,000 [Y] calorie diet is how many calories [Z]?
800 calories - Grade Points:
Scoring 85% [X] on a 120 [Y] point University final earns how many points [Z]?
102 points - Investment Interest:
5% [X] APR on a $1,000 [Y] high-yield savings account earns how much [Z]?
$50 - Restaurant Tip:
A 15% [X] tip on a $60 [Y] Olive Garden bill comes to how much [Z]?
$9 - Sale Discount:
20% [X] off a $80 [Y] pair of Levi's jeans saves you how much [Z]?
$16 - Tax Calculation:
8% [X] NYC sales tax on a $250 [Y] AirPods Pro comes to how much [Z]?
$20
How to Use
- Enter a percentage in the first box.
- Type the total number you're calculating from in the second box.
- The answer appears instantly.
- Need 2 decimal places? Just check the "Round" box.
- Press Enter or click "Add to Memos" to save your work.
How It Works
The Basic Percentage calculator uses this formula:
Example: What is 20% of 80?
So 20% of 80 is 16.
Need more percentage tools?
- Part-to-Whole Percentage
Find what % one number is of another. - Original Value Calculator
Reverse a percentage to the original amount. - Percentage Change Calculator
Work out increases or decreases. - Increased Value Calculator
Calculate value after percentage increase. - Decreased Value Calculator
Calculate value after percentage decrease. - Original Before Increase Calculator
Find original amount before percentage increase. - Original Before Decrease Calculator
Find original amount before percentage decrease. - Specialized Calculators (63+)
Practical everyday calculations for real-life scenarios.
Requirements and Important Information
- No installation required – works directly in your browser.
- Compatible with all modern browsers (Chrome, Firefox, Safari, Edge).
- Calculations are performed locally – no data is sent to any server.
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Your calculation memos is stored only on your device.
Each calculator stores up to 20 most recent calculations, automatically removing the oldest entries when this limit is reached. - Works offline after the initial page load.
- Supports both desktop and mobile devices.
- No account or login required.
Helpful Calculator Features
- Real-time calculations that update as you type.
- Copy results to clipboard with a single click.
- Calculation memos that persists between sessions.
- Option to round results for cleaner numbers.
- Clear visual formulas to understand the math.
- Mobile-friendly interface that works on all devices.
- Dark mode support for comfortable viewing.
- Keyboard shortcuts for faster calculations.
Tips for Accurate Calculations
- Verify Inputs: A small typo can make a big difference.
- Use Decimals: For precision, always use decimal points (e.g., 10.5).
- Instant Updates: Results appear immediately—no waiting.
- Rounding: Check "Round" to tidy up your results to 2 decimal places.