Percentage Calculator
Calculate percentages, percentage changes, discounts, tips, and more with instant results. Works entirely in your browser with no software downloads, installations, or account signup required..
What is Percentage Calculator | Rune
Percentage Calculator handles all types of percentage calculations, find a percentage of a number, calculate percentage increase/decrease, figure out discounts, tips, and more. Essential for students, shoppers, and business professionals. Provides precise calculations with detailed breakdowns and explanations for educational and professional use.
Supports multiple units, formats, and input methods to accommodate different calculation requirements. Results include clear formatting and export options for use in reports, spreadsheets, and presentations. This tool runs entirely in your browser, requiring no software downloads or installations on your device. All processing is handled locally in your browser.
Key Features of Percentage Calculator
Everything you need for professional percentage calculator
Multiple Calculation Modes
Find X% of Y, what % X is of Y, percentage change, increase, decrease, and more.
Discount Calculator
Calculate sale prices and savings from percentage-based discounts.
Percentage Change
Calculate percentage increase or decrease between two values.
Instant Results
Get results instantly as you type, no need to press calculate.
Calculation History
Keep track of recent calculations for reference and comparison.
Always Free
No sign-up required, no usage limits. Just fast, accurate percentage math.
How to Use Percentage Calculator
Follow these simple steps to get started
Choose Calculation
Select the type of percentage calculation you need.
Enter Values
Input the numbers you want to calculate the percentage for.
View Result
See the result instantly with a clear breakdown of the calculation.
Pro Tips
- To find 15% of 200: use 'What is X% of Y' mode → 15% of 200 = 30.
- Percentage change = ((New − Old) / Old) × 100, negative means a decrease.
- To reverse a percentage, e.g., 'if 30 is 15% of what?', use the reverse mode.
- Chain discount calculations: 20% off then 10% off is NOT the same as 30% off.
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Frequently Asked Questions
Everything you need to know about Percentage Calculator
What types of percentage calculations are supported?
Find X% of Y, what percentage X is of Y, percentage increase/decrease, percentage change between two values, and reverse percentage calculations.
How do I calculate a discount?
Enter the original price and discount percentage. The calculator shows the sale price and how much you save.
What is percentage change?
Percentage change shows how much a value has increased or decreased relative to its original value: ((New − Old) / Old) × 100.
Is the calculator free?
Yes, completely free with no sign-up, no ads, and no limits on usage.
Can I calculate tip percentages?
Yes! Enter the bill amount and tip percentage to see the tip amount and total bill.
Does it handle decimal percentages?
Yes, you can use decimal percentages like 3.5%, 7.25%, etc. for precise calculations.
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