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Calculator
A free online calculator with basic and scientific functions: percentages, powers, roots, trigonometry and logarithms. Use the buttons or your keyboard.
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Questions and answers
Does the calculator follow the order of operations?
Yes. Brackets come first, then powers, then multiplication and division, and finally addition and subtraction.
How do I calculate a percentage?
Type the number, then ×, then the percentage followed by %. For example, 200 × 15 % gives 30.