Math Calculators – Free Tools

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Convert a decimal to a percentage and an approximate reduced fraction.

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Evaluate common powers, roots, logarithms and trigonometric functions without executable expressions.

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Simplify a ratio and solve a proportional fourth value.

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Find the mean, median, mode, range and sum of a number list.

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Calculate a simple event probability, complement and repeated independent trials.

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Calculate descriptive statistics including variance and standard deviation.

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Raise a base to an exponent and display standard and scientific notation.

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Calculate a square root or a general nth root with domain validation.

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Calculate common two-dimensional area and perimeter measurements.

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Calculate a percentage of a value, a ratio percentage or a percentage change.