Math Calculators

Percentage Calculator

Multi-mode percentage calculator: X% of Y, X is what % of Y, percent change, add or subtract a percent.

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GPA Calculator

Credit-weighted GPA calculator on the US 4.0 scale, with an optional prior-GPA mode for cumulative GPA.

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Percentage Calculator

All-in-one percentage calculator: X% of Y, X is what % of Y, percent change, and add or subtract a percent.

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Fraction Calculator

Add, subtract, multiply or divide fractions. Simplified result, decimal value and step-by-step working.

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Average Calculator

Find the mean, median, mode, range, sum and count of any list of numbers — live as you type.

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Standard Deviation Calculator

Population and sample standard deviation, variance and mean for any data set, with the formula and steps.

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Ratio Calculator

Solve A:B = C:D for the missing value or simplify any ratio to its lowest terms.

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Random Number Generator

Generate random integers between any min and max, with or without duplicates. One-click copy to clipboard.

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Scientific Calculator

Full scientific calculator with powers, roots, logs, trig, parentheses, pi, e and memory. Keyboard support.

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Percent Error Calculator

Calculate percent error and absolute error from an observed value and the true value, with the formula shown.

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Exponent Calculator

Raise any base to any power — negative and decimal exponents supported — with step-by-step working.

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Square Root Calculator

Find the square root or any nth root of a number, with the simplified radical form where it is clean.

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Rounding Calculator

Round any number to decimal places, the nearest whole, or the nearest 10, 100 or 1000 with several modes.

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Area Calculator

Calculate the area of a rectangle, triangle, circle, trapezoid and more, with the formula for each shape.

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