Math calculators
From quick percentages to fractions, exponents and right triangles, these calculators handle the arithmetic and algebra that comes up in school, work and everyday life. Each one shows the formula and a worked example, so you can follow the method as well as get the answer.
Fraction Calculator
Add, subtract, multiply and divide fractions, with simplified and mixed-number answers.
Percentage Calculator
Find X% of a number, what percent one number is of another, or the whole from a part.
Pythagorean Theorem Calculator
Find the missing side of a right triangle from the other two sides.
Area of a Circle Calculator
Find the area of a circle from its radius — or the radius from the area.
Exponent Calculator
Raise a number to any power, or solve for the base or the exponent.
GCF and LCM Calculator
Find the greatest common factor and least common multiple of two or more numbers.
Percentage Change Calculator
Calculate the percent increase or decrease between an old and a new value.
Scientific Notation Calculator
Convert any number to scientific, E and engineering notation.