Free Math Calculators
Scientific, fraction, GPA, statistics and equation calculators.
Scientific Calculator
Trig, logs, powers, roots and brackets — with history.Fraction Calculator
Add, subtract, multiply and divide fractions with steps shown.GPA Calculator
Term and cumulative GPA on the 4.0 scale, weighted or unweighted.Grade Calculator
What you need on the final — or your weighted grade so far.Average Calculator
Mean, median, mode, range and sum of a list of numbers.Standard Deviation Calculator
Sample and population standard deviation with the steps shown.Random Number Generator
Random numbers in any range — unique, sorted or decimal.Ratio Calculator
Solve proportions, simplify ratios or split a total.Exponent Calculator
Powers and nth roots, with full digits and scientific notation.LCM and GCF Calculator
Least common multiple and greatest common factor of any numbers.Quadratic Equation Solver
Real or complex roots of ax² + bx + c = 0, with steps.Scientific Notation Converter
Numbers to scientific, E and engineering notation — and back.Significant Figures Calculator
Count sig figs in a number and round to any number of them.Roman Numeral Converter
Numbers to Roman numerals and back, from 1 to 3,999.Number Base Converter
Binary, octal, decimal, hex and any base from 2 to 36.
Math calculators with the working shown
Whether you’re checking homework, revising for an exam or solving a problem at work, these calculators give the answer and show how to get there. They are made for students in middle school, high school and university, and for anyone who needs a quick, reliable result.
- Calculating: a full scientific calculator with trig, logs and history, plus fractions, exponents and roots and ratios.
- Grades and school: GPA calculator for the 4.0 scale and the grade calculator to find what you need on your final.
- Statistics: mean, median and mode, standard deviation and a fair random number generator.
- Algebra and number theory: quadratic equation solver and LCM and GCF with prime factors.
- Notation and number systems: scientific notation, significant figures, Roman numerals and binary, octal and hexadecimal.
Every page explains the formula with a worked example, so you can follow the method rather than just copy the answer. All calculations run in your browser, and nothing you type is uploaded.