Student Calculators
Everything you need for homework and study, grouped by subject: math, science and grades.
Math
Percentage Calculator
Three common percentage questions in one place, pick a mode and type your numbers.
OpenFraction Calculator
Add, subtract, multiply or divide two fractions, simplified automatically.
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.
OpenSlope Calculator
Find the slope and equation of the line through two points.
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.
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.
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.
OpenScience
Ohm's Law Calculator
Enter any two of voltage, current and resistance and get the third, plus power.
OpenDensity Calculator
Find density from mass and volume with the formula density = mass divided by volume.
OpenForce Calculator
Calculate force from mass and acceleration using Newton's second law, F = ma.
OpenKinetic Energy Calculator
Find the kinetic energy of a moving object from its mass and velocity.
OpenMolarity Calculator
Find the molarity (concentration) of a solution from moles of solute and volume.
OpenMolar Mass Calculator
Type a chemical formula, like H2SO4 or Ca(OH)2, to get its molar mass in grams per mole.
OpenIdeal Gas Law Calculator
Find the moles of a gas from its pressure, volume and temperature using PV = nRT.
OpenTemperature Converter
Convert a temperature between Celsius, Fahrenheit and Kelvin.
Open