Fast, Accurate Online Calculators & Tools

Simple, powerful, and free calculators, converters, and tools for everyday use.

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Our most frequently used calculators and converters

Scientific Calculator

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Percentage Calculator

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Grade Calculator

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Final Exam Grade Calculator

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GPA Calculator

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BMI Calculator

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Mortgage Calculator

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Retirement Calculator

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Roth IRA Calculator

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Compound Interest Calculator

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Triangle Calculator

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Circle Calculator

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Rectangle Calculator

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Pythagorean Theorem

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Polygon Calculator

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Fraction Calculator

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Basic Probability Calculator

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Expectation Calculator

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Variance Calculator

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Standard Deviation Calculator

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Probability Distribution Calculator

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Normal Distribution Calculator

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Binary to Text Converter

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Text to Binary Converter

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Binary to Hex Converter

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Hex to Binary Converter

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Two's Complement Calculator

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Binary Calculator

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Watts to Amps Calculator

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Volts to Amps Calculator

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Ohm's Law Calculator

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Energy Cost Calculator

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Wire Gauge Calculator

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Length Converter

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Temperature Converter

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Weight Converter

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