Percentage Calculator
Easily calculate percentages, rate of change, and discount amounts.
What is B% of A?
Calculate the percentage of a number.
%
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Rate of Change
Calculate the percentage change from one value to another.
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Discount Calculator
Calculate the final price after applying a discount rate.
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Discount Amount
Final Price
Original Price
Percentage Formulas
• What is B% of A? = A × B ÷ 100
• Change Rate = (To - From) ÷ From × 100
• Discount Calculator = Original Price × (1 - Discount Rate ÷ 100)
• This tool runs entirely in your browser — no data is sent to the server.