Math calculators
Free Math calculators. Pick one to get started.
Percentage Calculator
Three common percentage questions in one place, pick a mode and type your numbers.
OpenGPA Calculator
Enter your course grades and credits to get your grade point average on a 4.0 scale.
OpenFinal Grade Calculator
Find the score you need on your final exam to reach the grade you want.
OpenFraction Calculator
Add, subtract, multiply or divide two fractions, simplified automatically.
OpenSquare Footage Calculator
Calculate the area of a room or space, plus perimeter and material cost.
OpenAverage (Mean) Calculator
Enter a list of numbers to get the mean, median, sum and count.
OpenStandard Deviation Calculator
Get the standard deviation, variance and mean of a data set.
OpenRatio Calculator
Simplify a ratio and solve a proportion in one place.
OpenTest Grade Calculator
Turn questions answered correctly into a percentage and letter grade.
OpenGCF & LCM Calculator
Find the greatest common factor and least common multiple of two numbers.
OpenQuadratic Formula Calculator
Solve ax² + bx + c = 0 for its roots, real or complex.
OpenSlope Calculator
Find the slope and equation of the line through two points.
OpenTemperature Converter
Convert a temperature between Celsius, Fahrenheit and Kelvin.
OpenPythagorean Theorem Calculator
Find the hypotenuse of a right triangle from the two shorter sides.
OpenScientific Notation Calculator
Convert any number to scientific notation, showing the coefficient and the power of ten.
OpenRoman Numeral Converter
Turn any whole number from 1 to 3999 into Roman numerals.
OpenPercentage Increase Calculator
Find the percentage increase or decrease from one number to another.
OpenScientific Calculator
A full scientific calculator with trig, logs, powers, roots and more. Type or tap.
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