What is Percentage Calculator?
The Percentage Calculator is a versatile tool designed to solve common math problems involving percentages. Whether you're calculating a discount, determining a tip, figuring out tax, or analyzing growth rates, this tool provides instant answers. It handles various scenarios: finding X% of Y, determining what percentage X is of Y, and calculating the percentage increase or decrease between two numbers.
Input Formats
- Numbers
- Decimals
Output Results
- Calculated value
- Percentage difference
Key Features
Multi-Mode: Solve for Percentage, Increase/Decrease, and 'What % of'
Instant Results: See the answer immediately as you type
Formula Display: Learn the math behind the calculation
Privacy: 100% Client-side processing
Finance Ready: Perfect for calculating tips, taxes, and discounts
Growth Analysis: Easily track year-over-year changes
Universal: Handles decimals and negative numbers correctly
Amazing & Free: The most amazing free percentage calculator for finance
Shareable LinksShare the calculation result. (Limit: 1KB)
Who is this for?
Finance
Calculating sales tax, discounts, or interest rates.
Tax calculatorDiscount mathInterest rate
Education
Checking homework answers for percentage problems.
Math helpHomework checkerPercentage formula
Business
Analyzing year-over-year growth or profit margins.
Growth rateMargin calcBusiness metrics
How to Use
1
Select the type of calculation you need.
2
Enter the values in the input fields.
3
The result appears instantly.
Frequently Asked Questions
How do I calculate a percentage increase?
Use my 'Percentage Change' mode. Or manually: (New - Old) / Old * 100.
How do I calculate X% of Y?
Multiply Y by X, then divide by 100. Or just type it in and I'll do it for you!
Can I use decimals?
Yes! I love decimals. I'm very precise.
Is it free?
Yes, 100% free forever.
Does it show the formula?
I show you the result instantly. The math is standard percentage formulas.
Can I calculate negative percentages?
Yes. If a number goes down, I'll show you the negative percentage change.
Is it secure?
Yes. I calculate everything right here on your screen.