Primes, fractions, stats, roman numerals and more.
Free math tools: GCD and LCM, prime checker, fractions, standard deviation, roman numerals, base converter, quadratic solver and number to words. Fast and client-side. All 26 tools below are free, run entirely in your browser, and need no sign-up.
Free prime number checker. Enter any whole number and instantly see whether it is prime or composite, with its smallest factor when it is not.
Free prime factorization calculator. Break any whole number into its prime factors and see the result in expanded and exponent form instantly.
Free factorial calculator. Compute n factorial for any non-negative integer, with exact big-integer results and no rounding for large inputs.
Free Fibonacci sequence generator. Produce the first N Fibonacci numbers with exact big-integer values, plus the nth term and running sum.
Free percentage increase and decrease calculator. Find the percent change between two numbers and the new value after applying a percentage.
Free ratio simplifier. Reduce any ratio to its simplest whole-number form and see the decimal equivalent, using the greatest common divisor.
Free mean, median, mode and range calculator. Paste a list of numbers and get all four measures of center and spread instantly, with the count and sum.
Free number to words converter. Spell any whole number in plain English, from zero up into the trillions, for checks, contracts and homework.
Free base converter for any radix from 2 to 36. Convert a number between binary, octal, decimal, hex and any custom base with one entry.
Free modulo calculator. Find the remainder of a division, plus the quotient and the true mathematical modulo, for any two numbers instantly.
Free exponent calculator. Raise any base to any power, including negative and fractional exponents, and see the exact or precise decimal result.
Free logarithm calculator. Compute the log of any positive number in any base, including natural log and log base 10, with the exponent check shown.
Free permutation and combination calculator. Compute nPr and nCr for any n and r using exact big-integer math, with the factorial formulas shown.
Free probability calculator. Find the probability of single and combined events, including AND, OR, and NOT, as a fraction, decimal and percentage.
Free fraction to decimal converter. Turn any fraction into its decimal value and percentage, and see repeating digits marked clearly.
Free decimal to fraction converter. Turn any decimal into its exact simplified fraction, including repeating decimals, plus a mixed number form.
Free proportion solver. Cross multiply to solve for the missing value in a proportion a over b equals c over x, with the work shown.
Free slope calculator. Enter two points and get the slope, the line equation, the angle in degrees, and the y-intercept instantly.
Free distance between two points calculator. Use the distance formula to find the straight-line length between two coordinates, with the steps shown.
Free midpoint calculator. Find the exact midpoint between two coordinates using the midpoint formula, averaging the x and y values.
Free scientific notation converter. Switch between standard decimal numbers and scientific notation both ways, with the E-notation form shown too.
Free rounding calculator. Round any number to a set number of decimal places, significant figures, or the nearest ten, hundred or thousand.
Free LCM of a list calculator. Find the least common multiple of many numbers at once, using exact big-integer math so large results stay precise.
Free greatest common factor calculator. Find the GCF of many numbers at once using the Euclidean algorithm, exact for very large values.
Free arithmetic series calculator. Sum an arithmetic sequence from its first term, common difference and length, or find the nth term instantly.
Free triangle area calculator. Find the area of any triangle from its three sides using Heron formula, or from a base and height, instantly.
Yes. Every math tool on yourhack.ai is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.
There are currently 26 free math tools here, and we add more regularly.