Math Tools

Primes, fractions, stats, roman numerals and more. 26 free tools, no sign-up.

Prime Number CheckerEnter any whole number and instantly see whether it is prime or composite, with its smallest factor when it is not.Prime Factorization CalculatorBreak any whole number into its prime factors and see the result in expanded and exponent form instantly.Factorial CalculatorCompute n factorial for any non-negative integer, with exact big-integer results and no rounding for large inputs.Fibonacci Sequence GeneratorProduce the first N Fibonacci numbers with exact big-integer values, plus the nth term and running sum.Percentage Increase and Decrease CalculatorFind the percent change between two numbers and the new value after applying a percentage.Ratio SimplifierReduce any ratio to its simplest whole-number form and see the decimal equivalent, using the greatest common divisor.Mean, Median, Mode and Range CalculatorPaste a list of numbers and get all four measures of center and spread instantly, with the count and sum.Number to Words ConverterSpell any whole number in plain English, from zero up into the trillions, for checks, contracts and homework.Base Converter (Any Base 2 to 36)Convert a number between binary, octal, decimal, hex and any custom base with one entry.Modulo CalculatorFind the remainder of a division, plus the quotient and the true mathematical modulo, for any two numbers instantly.Exponent CalculatorRaise any base to any power, including negative and fractional exponents, and see the exact or precise decimal result.Logarithm CalculatorCompute the log of any positive number in any base, including natural log and log base 10, with the exponent check shown.Permutation and Combination CalculatorCompute nPr and nCr for any n and r using exact big-integer math, with the factorial formulas shown.Probability CalculatorFind the probability of single and combined events, including AND, OR, and NOT, as a fraction, decimal and percentage.Fraction to Decimal ConverterTurn any fraction into its decimal value and percentage, and see repeating digits marked clearly.Decimal to Fraction ConverterTurn any decimal into its exact simplified fraction, including repeating decimals, plus a mixed number form.Proportion Solver (Solve for X)Cross multiply to solve for the missing value in a proportion a over b equals c over x, with the work shown.Slope Calculator (Two Points)Enter two points and get the slope, the line equation, the angle in degrees, and the y-intercept instantly.Distance Between Two Points CalculatorUse the distance formula to find the straight-line length between two coordinates, with the steps shown.Midpoint CalculatorFind the exact midpoint between two coordinates using the midpoint formula, averaging the x and y values.Scientific Notation to DecimalSwitch between standard decimal numbers and scientific notation both ways, with the E-notation form shown too.Rounding Calculator (Decimals and Sig Figs)Round any number to a set number of decimal places, significant figures, or the nearest ten, hundred or thousand.LCM of a List CalculatorFind the least common multiple of many numbers at once, using exact big-integer math so large results stay precise.GCF of a List CalculatorFind the GCF of many numbers at once using the Euclidean algorithm, exact for very large values.Arithmetic Series Sum CalculatorSum an arithmetic sequence from its first term, common difference and length, or find the nth term instantly.Triangle Area Calculator (Heron Formula)Find the area of any triangle from its three sides using Heron formula, or from a base and height, instantly.

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 are free, run entirely in your browser, and need no sign-up.

Frequently asked questions

Are these math tools free?

Yes. Every math tool on yourhack.ai is completely free, with no sign-up and no usage limits.

Do these math tools work on mobile?

Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.

Is my data private?

Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.

How many math tools are there?

There are currently 26 free math tools here, and we add more regularly.

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