Math calculators
Percentages, fractions, algebra and geometry. 36 in this section.
- Percentage CalculatorFind X% of a number, what percent one number is of another, or the whole from a part and a percent.
- Percent Change CalculatorPercent increase or decrease from an old value to a new value, with the absolute change and multiplier.
- Percent Difference CalculatorPercent difference between two values, compared against their average rather than either one.
- Fraction CalculatorAdd, subtract, multiply or divide fractions and mixed numbers. Shows simplified, mixed and decimal answers.
- Decimal to Fraction CalculatorConvert a decimal, including repeating decimals like 0.(3), to a fraction in lowest terms and a mixed number.
- Fraction to Decimal CalculatorConvert a fraction or mixed number to a decimal and a percent, with repeating digits marked.
- Ratio CalculatorSimplify a ratio like 12:18 to lowest terms, see each part as a share of the total, or scale it up or down.
- Proportion CalculatorSolve a proportion a/b = c/x for the missing value using cross multiplication.
- Rounding CalculatorRound a number to the nearest thousand, ten, whole number, tenth, hundredth, or to a set number of significant figures.
- Significant Figures CalculatorCount the significant figures in a number and see which digits count, using the standard sig fig rules.
- Scientific Notation CalculatorConvert numbers to and from scientific, E and engineering notation, exactly digit for digit.
- Exponent CalculatorRaise any number to any power, including negative and fractional exponents, with exact digits for whole-number powers.
- Square Root and Nth Root CalculatorSquare roots, cube roots and any nth root, with simplified radical form for whole numbers.
- Logarithm CalculatorLogarithm of a number in base 10, base e (natural log), base 2 or any custom base.
- Factorial CalculatorExact factorial n! for any whole number up to 1000, with digit count and trailing zeros.
- GCF CalculatorGreatest common factor (GCD) of two or more whole numbers, with each number's prime factorization.
- LCM CalculatorLeast common multiple of a list of whole numbers, exact even when the answer is very large.
- Prime Factorization CalculatorCheck whether a number is prime and break it into prime factors, with its divisors and their count.
- Quadratic Equation CalculatorSolve ax² + bx + c = 0 with the quadratic formula, including complex roots, the discriminant and the vertex.
- System of Equations CalculatorSolve two linear equations in two unknowns (ax + by = c) using Cramer's rule.
- Slope CalculatorSlope between two points and the line equation in slope-intercept, point-slope and standard form.
- Distance CalculatorDistance between two points in 2D or 3D using the distance formula.
- Midpoint CalculatorMidpoint between two points in 2D or 3D, plus the distance from each end.
- Pythagorean Theorem CalculatorFind the missing side of a right triangle (either leg or the hypotenuse) using a² + b² = c².
- Triangle CalculatorSolve a triangle from its three sides (SSS): all three angles, area, perimeter, heights and triangle type.
- Right Triangle CalculatorSolve a right triangle from one acute angle and one side using sine, cosine and tangent.
- Circle CalculatorEnter a circle's radius, diameter, circumference or area to get all the others.
- Area CalculatorArea of a rectangle, triangle, circle, trapezoid, parallelogram, ellipse or circle sector.
- Volume CalculatorVolume of a cube, box, cylinder, sphere, cone, pyramid or capsule, with liters and gallons.
- Surface Area CalculatorTotal surface area of a cube, box, cylinder, sphere, cone, rectangular pyramid or capsule.
- Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals back to numbers, from 1 to 3999.
- Number Base ConverterConvert whole numbers between binary, octal, decimal, hexadecimal or any base from 2 to 36.
- Long Division CalculatorDivide whole numbers to get the quotient and remainder, with every long division step shown.
- Average CalculatorMean of a list of numbers, plus the median, mode, sum, count and range.
- Matrix Determinant CalculatorDeterminant of a 2×2 or 3×3 matrix with the cofactor expansion shown, plus whether it is invertible.
- Modulo Calculatora mod n (the remainder after division) with both the math (floored) and programming (truncated) conventions.