Category
Math calculators
Math tools with plain-language inputs, documented formulas, and limitations. Estimates only — verify important decisions with a qualified professional when needed.
View all calculatorsPercentage Calculator
Solve common percentage questions and percentage increases or decreases.
Open calculator →MathPercentage Change Calculator
Measure the absolute and percentage change between two values.
Open calculator →MathFraction Calculator
Add, subtract, multiply, or divide two integer fractions and simplify the result.
Open calculator →MathAverage Calculator
Summarize a comma-separated numeric list with its count, sum, mean, minimum, and maximum.
Open calculator →MathRatio Calculator
Simplify an integer ratio and calculate its finite decimal comparison.
Open calculator →MathGPA Calculator
Estimate a credit-weighted unweighted GPA on a 4.0 scale.
Open calculator →MathArea Calculator
Calculate area for rectangles, squares, triangles, circles, and trapezoids.
Open calculator →MathVolume Calculator
Calculate volume for cubes, rectangular prisms, cylinders, cones, and spheres.
Open calculator →MathSpeed Calculator
Solve for speed, distance, or time using metric or imperial travel units.
Open calculator →MathUnit Converter
Convert length, mass, temperature, area, and volume units with deterministic factors.
Open calculator →MathGrade Calculator
Convert a raw score into a percentage grade.
Open calculator →MathFinal Grade Calculator
Find the final-exam score needed to reach a desired course grade.
Open calculator →MathWeighted Grade Calculator
Average scores with explicit weights.
Open calculator →MathLCM Calculator
Find the least common multiple of two non-zero integers.
Open calculator →MathGCD Calculator
Find the greatest common divisor of two integers.
Open calculator →MathQuadratic Formula Calculator
Solve ax² + bx + c = 0 for real roots.
Open calculator →MathPythagorean Theorem Calculator
Solve for a right-triangle hypotenuse or missing leg.
Open calculator →MathPermutation Combination Calculator
Calculate permutations nPr or combinations nCr.
Open calculator →MathStandard Deviation Calculator
Compute mean plus population and sample standard deviation.
Open calculator →MathMedian Calculator
Find the median of a numeric list.
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