Math Calculators
Fast, reliable math tools for everyday calculations — percentages, fractions, averages, standard deviation, ratios, GCF / LCM, exponents, square roots, quadratics and scientific notation. Every calculator is free, instant and private.
Percentage Calculator
Percent of, what percent, and percent change.
Fraction Calculator
Add, subtract, multiply or divide two fractions.
Average Calculator
Mean, median, mode, range, sum and count.
Standard Deviation
Sample and population standard deviation and variance.
Ratio Calculator
Simplify ratios and solve proportions A : B = C : D.
GCF & LCM
Greatest common factor and least common multiple of two or more numbers.
Exponent Calculator
Raise any base to any power — positive, negative, zero or fractional exponents.
Square Root Calculator
Find the square root of any number as a decimal and in simplified radical form, plus cube roots and other nth roots.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 with the discriminant and real or complex roots.
Scientific Notation Converter
Convert decimals to scientific notation and back, with E-notation too.