Math & Science Calculators

10 free math and science calculators — scientific, fractions, percentages, triangle solver, random number generator, quadratic formula, statistics, grades, unit conversion & number systems.

Scientific Calculator

Sin, cos, tan, log, exponents, memory — full scientific calculator.

Fraction Calculator

Add, subtract, multiply & divide fractions with step-by-step working.

Percentage Calculator

Find percentages, percentage of numbers, and percentage change.

Statistics Calculator

Mean, median, mode, standard deviation, variance from any data set.

Binary / Hex Converter

Convert between binary, hexadecimal, decimal & octal number systems.

Grade Calculator

Weighted average grade, letter grade, GPA, and score needed to reach your target.

Convert length, weight, temperature, area, volume, speed & data units instantly.

Triangle Calculator

Solve any triangle from 3 known values — sides, angles, area, height & a to-scale drawing.

Quadratic Formula Calculator

Solve ax²+bx+c=0 — real & complex roots, discriminant & step-by-step solution.

Random Number Generator

Pick one or many random numbers in any range — unique, sortable, with a chart.