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Math Calculators
Free math calculators for percentages, fractions, ratios, exponents, roots, logarithms, quadratic equations, factors and more, with the steps shown.
Arithmetic Sequence Calculatornth term and sum of a sequence with a common difference.Cross Multiplication CalculatorSolve a/b = c/x by cross-multiplying, with the working shown.Cross Product CalculatorCross product of two 3-D vectors, with magnitude, dot product and angle.Cube Root CalculatorCube root of any number, positive or negative.Decimal to Fraction CalculatorConvert a decimal to a simplified fraction, including repeating decimals.Expanded Form CalculatorWrite a number in expanded form, three ways.Exponent CalculatorRaise any base to any power — negative and fractional exponents too.Exponential Growth CalculatorProject growth or decay at a steady percentage rate.Factorial Calculatorn! exactly for small n, in scientific notation up to 5,000!.Fraction CalculatorAdd, subtract, multiply or divide two fractions, fully simplified.Fraction to Decimal CalculatorTurn any fraction or mixed number into a decimal, repeating digits marked.Fraction to Percent CalculatorConvert a fraction or mixed number to a percentage.GCF CalculatorGreatest common factor of two or more whole numbers.Geometric Sequence Calculatornth term and sum of a sequence with a common ratio.LCD CalculatorLeast common denominator of a list of fractions, with equivalents.LCM CalculatorLeast common multiple of two or more whole numbers.Linear Interpolation CalculatorEstimate y at any x on the straight line between two known points.Logarithm CalculatorLog of a number in base 10, e, 2 or any base you choose.Mixed Number CalculatorAdd, subtract, multiply or divide mixed numbers.Number to Words ConverterSpell out any number in English words, for checks and documents.Percent Change CalculatorPercentage change from an old value to a new one, up or down.Percent Decrease CalculatorFind the % decrease between two numbers, or take a % off a number.Percent Difference CalculatorSymmetric percent difference between two values.Percent Error CalculatorHow far a measured value is from the true value, in percent.Percent Increase CalculatorFind the % increase between two numbers, or add a % to a number.Percentage CalculatorWhat is X% of Y, X is what percent of Y, and X is Y% of what.Prime Factorization CalculatorBreak a whole number into its prime factors.Proportion CalculatorSolve A/B = C/D for whichever term is missing.Quadratic Formula CalculatorSolve ax² + bx + c = 0 — real or complex roots, discriminant, vertex.Random Number GeneratorSeeded pseudo-random numbers in any range — repeatable on demand.Ratio CalculatorSimplify a ratio and split a total in that ratio.Remainder CalculatorQuotient and remainder of a division, as in long division.Roman Numeral ConverterConvert numbers to Roman numerals and back, 1 to 3,999.Rounding CalculatorRound to any place value — nearest ten, whole number, tenth, hundredth…Scale Factor CalculatorScale factor between an original and a copy, as a ratio and multiplier.Scientific Notation ConverterConvert numbers to and from scientific, E and engineering notation.Sig Fig CalculatorCount significant figures and round to any number of them.Square Root CalculatorSquare root of any number, plus the simplified radical form.Vertex Form CalculatorConvert y = ax² + bx + c to vertex form and find the vertex.