MATH
Math calculators
made simple.
Straightforward tools for common math problems.
19 calculators
Test Grade Calculator
Calculate a percentage score and an estimated letter grade from total and incorrect answers.
Open calculator →mathGrade Calculator
Calculate a current grade from any number of assignments, then estimate the final-exam score needed to reach your target.
Open calculator →mathAverage Calculator
Find the arithmetic mean of three numbers.
Open calculator →mathRatio Calculator
Express two numbers as a simplified ratio.
Open calculator →mathExponent Calculator
Raise a number to a power.
Open calculator →mathSquare Root Calculator
Find the principal square root of a non-negative number.
Open calculator →mathVolume Calculator
Calculate the volume of a rectangular prism from its length, width, and height.
Open calculator →mathArea Calculator
Calculate the area of a rectangle from length and width.
Open calculator →mathMulch Calculator
Estimate mulch volume, bags, and material cost for a rectangular garden bed.
Open calculator →mathConcrete Calculator
Estimate ready-mix volume or 60 lb concrete bags for a rectangular slab.
Open calculator →mathPythagorean Theorem Calculator
Find the hypotenuse of a right triangle.
Open calculator →mathDistance Calculator
Calculate the straight-line distance between two coordinate points.
Open calculator →mathSlope Calculator
Find the slope between two coordinate points.
Open calculator →mathQuadratic Formula Calculator
Solve a quadratic equation in the form ax² + bx + c = 0.
Open calculator →mathPercent Error Calculator
Calculate the percent error between an observed and accepted value.
Open calculator →mathSpeed Calculator
Calculate average speed from distance and time.
Open calculator →mathDensity Calculator
Calculate density from mass and volume.
Open calculator →mathFraction Calculator
Convert a fraction to a decimal and percentage.
Open calculator →mathStandard Deviation Calculator
Calculate the population standard deviation of three values.
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