Percentage Calculator
Calculate percentages online with increase, decrease, and ratio modes. Free percentage calculator for discounts, tips, and math.
What is X% of Y?
X is what % of Y?
X is Y% of what?
Percentage Change
Increase/Decrease by Percentage
Percentage Formulas
X% of Y: (X/100) × Y
X is what % of Y: (X/Y) × 100
% Change: ((New - Old) / Old) × 100
Increase by X%: Value × (1 + X/100)
How to Use Percentage Calculator
Enter your values
Open Percentage Calculator and enter the values you want to calculate or convert.
Select units or options
Choose the input and output units, formats, or calculation parameters.
View results instantly
Results are calculated in real-time as you type — no submit button needed.
Copy or use the result
Copy the calculated result or use it directly in your work.
Frequently Asked Questions
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