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Taurang

➗ 48 tools

Math Calculators

From percentages and fractions to logarithms and quadratic equations, these math calculators show exact results — using arbitrary-precision integers wherever whole-number answers can get very large.

Percentage CalculatorFind X percent of any number instantly.What Percent Is X of Y CalculatorFind what percentage one number is of another.Percentage Change CalculatorCalculate the percentage increase or decrease from an old value to a new value.Percentage Increase CalculatorIncrease a number by a given percentage.Percentage Decrease CalculatorDecrease a number by a given percentage.Percent Difference CalculatorCalculate the percent difference between two values relative to their average.Percent Error CalculatorCalculate percent error between a measured (experimental) value and the true value.Fraction to Decimal CalculatorConvert any fraction or mixed number to a decimal and a percentage.Decimal to Fraction CalculatorConvert a decimal number to its simplest fraction and mixed number.Fraction CalculatorAdd, subtract, multiply or divide two fractions and get a simplified answer.Ratio CalculatorSimplify a ratio and scale it to a new total or term.Proportion CalculatorSolve a proportion A/B = C/X for the missing value using cross-multiplication.GCD CalculatorFind the greatest common divisor (GCF/HCF) of two or more whole numbers.LCM CalculatorFind the least common multiple of two or more whole numbers.Square Root CalculatorCalculate the square root of any number, and check whether it is a perfect square.Cube Root CalculatorCalculate the cube root of any positive or negative number.Nth Root CalculatorCalculate the nth root of a number for any index n.Exponent CalculatorRaise a base number to any power, including negative and fractional exponents.Logarithm CalculatorCalculate the logarithm of a number in any base, plus natural log and log base 10.Factorial CalculatorCalculate n! exactly, with every digit, for whole numbers up to 5,000.Scientific Notation ConverterConvert a number to scientific notation, E notation and engineering notation.Rounding CalculatorRound a number to any number of decimal places or to the nearest 10, 100 or 1,000.Significant Figures CalculatorRound a number to a chosen number of significant figures.Prime Number CheckerCheck whether a number is prime and list its divisors.Prime Factorization CalculatorBreak a whole number into its prime factors.Quadratic Equation SolverSolve ax² + bx + c = 0 with the quadratic formula, including complex roots.Pythagorean Theorem CalculatorFind the hypotenuse of a right triangle from its two legs.Distance Formula CalculatorCalculate the distance and midpoint between two points on a plane.Slope CalculatorFind the slope, y-intercept and equation of the line through two points.Midpoint CalculatorFind the midpoint between two coordinates.Permutation CalculatorCount ordered arrangements (permutations) of r items chosen from n.Combination CalculatorCount unordered selections (combinations) of r items from n.Roman Numeral ConverterConvert numbers 1–3999 into Roman numerals.Roman Numerals to NumbersConvert Roman numerals back into ordinary numbers, with validation.Number to Words ConverterWrite any number in English words — handy for cheques and legal documents.Decimal to Binary ConverterConvert decimal (base 10) numbers to binary (base 2) — exact for any size integer.Binary to Decimal ConverterConvert binary numbers to decimal, exactly, for any length.Decimal to Hex ConverterConvert decimal numbers to hexadecimal (base 16).Hex to Decimal ConverterConvert hexadecimal numbers to decimal.Decimal to Octal ConverterConvert decimal numbers to octal (base 8).Octal to Decimal ConverterConvert octal numbers to decimal.Hex to Binary ConverterConvert hexadecimal values to binary.Binary to Hex ConverterConvert binary values to hexadecimal.Number Base ConverterConvert numbers between any bases from 2 to 36.Modulo CalculatorFind the remainder (a mod n) and quotient of integer division.Fibonacci CalculatorFind the nth Fibonacci number exactly and list the sequence.Golden Ratio CalculatorSplit a length into golden-ratio parts (φ ≈ 1.618) for design and layout.Random Number GeneratorGenerate cryptographically secure random whole numbers within any range, with or…

Why use Taurang math calculators?

Percentages, fractions, roots, exponents, logarithms, number bases, primes and equation solvers. Each tool page includes the formula, a worked example, a chart and answers to common questions, so you understand the result as well as get it.

Tips

Use the formula section on each page to check your homework method, not just the answer.
For very large factorials, combinations and base conversions we use exact big-integer math.
Floating-point results are rounded to 12 significant digits to remove binary noise.

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