Math Calculators
Math calculators for everyday numbers. Work out percentages and percent change, simplify a ratio or solve a proportion, find a GCF or LCM, calculate volume, find the slope or midpoint of a line, work out averages, weighted averages and standard deviation, count permutations and combinations, solve a quadratic equation, and do quick sums on a basic or simple calculator. Every calculator runs in your browser, shows its steps and needs no sign-up.
Last updated October 20, 2026
Featured tools
Math & Statistics · Arithmetic & Percentages
Percentage CalculatorPercent of a number, percent change and percent increase or decrease
Math & Statistics · Arithmetic & Percentages
Ratio CalculatorSimplify a ratio or solve a proportion for the missing number
Math & Statistics · Geometry
Slope CalculatorSlope, line equation, angle and distance from two points
Math & Statistics · Geometry
Volume CalculatorVolume of a cube, box, cylinder, cone, sphere or pyramid
Math & Statistics · Statistics & Probability
Average CalculatorMean, median, mode, sum and range of a list of numbers
Math & Statistics · Statistics & Probability
Standard Deviation CalculatorStandard deviation and variance of a sample or a population
All Math & Statistics calculators
Arithmetic & Percentages
Percentages, fractions, factors and number bases
Math & Statistics · Arithmetic & Percentages
Percentage CalculatorPercent of a number, percent change and percent increase or decrease
Math & Statistics · Arithmetic & Percentages
Ratio CalculatorSimplify a ratio or solve a proportion for the missing number
Math & Statistics · Arithmetic & Percentages
LCM CalculatorLeast common multiple of 2 to 10 numbers, with prime factors
Math & Statistics · Arithmetic & Percentages
GCF CalculatorGreatest common factor of 2 to 10 numbers, with prime factors
Math & Statistics · Arithmetic & Percentages
Square Root CalculatorSquare or cube root with radical form and nearest perfect squares
Math & Statistics · Arithmetic & Percentages
Factor CalculatorAll factors, factor pairs and prime factorization of a whole number
Math & Statistics · Arithmetic & Percentages
Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers, simplified
Math & Statistics · Arithmetic & Percentages
Exponent CalculatorRaise any base to any power, with scientific notation and negative exponents
Math & Statistics · Arithmetic & Percentages
Log CalculatorLogarithm of any base, plus ln, log10 and log2 with an antilog check
Math & Statistics · Arithmetic & Percentages
Binary ConverterConvert whole numbers between binary, octal, decimal, hexadecimal and any base to 36
Math & Statistics · Arithmetic & Percentages
Roman Numerals ConverterConvert numbers 1 to 3999 to Roman numerals and back, with strict validation and steps
Math & Statistics · Arithmetic & Percentages
Hex ConverterConvert hexadecimal to decimal, binary and octal and back, with the steps shown
Math & Statistics · Arithmetic & Percentages
Prime Factorization CalculatorPrime factors with division steps, exponent form and prime check
Algebra
Equations and the quadratic formula
Geometry
Slope, volume, area, distance and more
Math & Statistics · Geometry
Slope CalculatorSlope, line equation, angle and distance from two points
Math & Statistics · Geometry
Volume CalculatorVolume of a cube, box, cylinder, cone, sphere or pyramid
Math & Statistics · Geometry
Midpoint CalculatorMidpoint of two points, or the missing endpoint from a midpoint
Math & Statistics · Geometry
Pythagorean Theorem CalculatorMissing side, area, perimeter and angles of a right triangle from any two sides
Math & Statistics · Geometry
Circumference CalculatorCircumference, diameter, radius and area of a circle from any one of them
Math & Statistics · Geometry
Trigonometry CalculatorSin, cos, tan, inverse functions and a right-triangle solver
Math & Statistics · Geometry
Geometry CalculatorArea and perimeter of common 2D shapes
Math & Statistics · Geometry
Distance CalculatorDistance between two points in 2D, 3D or by latitude and longitude
Math & Statistics · Geometry
Perimeter CalculatorPerimeter of a rectangle, square, triangle, circle, regular polygon or trapezoid
Math & Statistics · Geometry
Triangle CalculatorSolve a triangle from SSS, SAS or ASA/AAS: sides, angles, area and type
Math & Statistics · Geometry
Area CalculatorArea of a rectangle, triangle, circle, trapezoid, parallelogram, ellipse, polygon or sector in six units
Statistics & Probability
Averages, deviation, z-scores and combinations
Math & Statistics · Statistics & Probability
Average CalculatorMean, median, mode, sum and range of a list of numbers
Math & Statistics · Statistics & Probability
Standard Deviation CalculatorStandard deviation and variance of a sample or a population
Math & Statistics · Statistics & Probability
Weighted Average CalculatorAverage of values that count for different amounts, with each weight shown
Math & Statistics · Statistics & Probability
Permutation CalculatorOrdered arrangements nPr of r items from n, with or without repetition
Math & Statistics · Statistics & Probability
Combination CalculatorUnordered selections nCr of r items from n, with or without repetition
Math & Statistics · Statistics & Probability
Z-Score CalculatorZ-score, percentile and tail probabilities from a value, mean and standard deviation
Math & Statistics · Statistics & Probability
Probability CalculatorSingle event, A and B, A or B, conditional and repeated-trial probability with odds
Math & Statistics · Statistics & Probability
Statistics CalculatorMean, median, mode, quartiles, standard deviation and outliers of a list of numbers
Math & Statistics · Statistics & Probability
Sample Size CalculatorSurvey sample size for a proportion or mean, with finite population correction
Math & Statistics · Statistics & Probability
Margin of Error CalculatorMargin of error for a survey proportion, with optional population correction
Math & Statistics · Statistics & Probability
Confidence Interval CalculatorConfidence interval for a mean (z or t) or a proportion
Calculus & Matrices
Integrals, derivatives and matrices
Math & Statistics · Calculus & Matrices
Integral CalculatorApproximate a definite integral numerically with trapezoid, midpoint and Simpson rules
Math & Statistics · Calculus & Matrices
Matrix CalculatorAdd, multiply, invert and take determinants of matrices up to 4x4
Math & Statistics · Calculus & Matrices
Derivative CalculatorSymbolic derivative of f(x) with the rules shown, plus the slope and tangent line at a point
Math & Statistics · Calculus & Matrices
Calculus CalculatorOne page for the symbolic derivative with tangent line or a numerical definite integral, with steps
Physics & Chemistry
Physics and chemistry calculators
General-Purpose
Basic, simple and scientific calculators
Math & Statistics · General-Purpose
Basic CalculatorAdd, subtract, multiply and divide, with brackets, percent and powers
Math & Statistics · General-Purpose
Simple CalculatorBig keys for adding, subtracting, multiplying and dividing
Math & Statistics · General-Purpose
Scientific CalculatorTrig, logs, roots, powers and factorials with a DEG/RAD switch
Math & Statistics · General-Purpose
Math CalculatorType a whole math problem and see the order of operations
Math & Statistics · General-Purpose
Graphing CalculatorPlot up to six functions of x, zoom and pan, and find the y-intercept, vertex and roots of simple polynomials
Frequently asked questions
How do I calculate a percentage?
Use the Percentage Calculator: it finds a percent of a number, what percent one number is of another, and the percent change between two values.
How do I simplify a ratio?
Use the Ratio Calculator. It divides every term by their greatest common divisor and can also solve a proportion for a missing number.
How do I find the slope of a line?
Use the Slope Calculator: enter two points and it returns the slope, the line equation, the angle and the distance.
Do these calculators store my numbers?
No. Every calculation runs in your browser and nothing you enter is saved or uploaded.