Math calculators
Statistics, fractions, percentages, and number-crunching tools for students and professionals.
Percentage calculator
Find X% of Y, work out what percentage one number is of another, or calculate percentage change — formula shown for every result.
GCF and LCM calculator
Find the Greatest Common Factor and Least Common Multiple of any two integers, with prime factorization and Euclidean algorithm steps.
Mean median mode calculator
Mean, median, mode, range, sum, and count with step-by-step breakdowns.
Scientific notation calculator
Convert numbers to scientific notation, back to standard form, and multiply or divide in scientific notation.
Length converter
Convert mm, cm, m, km, in, ft, yd, and mi instantly with the formula shown for each result.
Volume converter
Convert ml, L, m³, fl oz, cups, pints, quarts, and US or UK gallons with formula shown.
Weight converter
Convert mg, g, kg, t, oz, lb, and st instantly. Live result with formula shown.
Temperature converter
Convert between Celsius, Fahrenheit, and Kelvin. All three values update at once with the formula shown.