Math Calculators
Scientific, algebra, statistics, geometry, and more. Browse all 46 free math calculators below.
Scientific Calculator
Scientific calculator with sin, cos, tan, ln, log, square root, powers, factorial and memory keys, in degrees or radians, plus e to the x and an EE key.
Fraction Calculator
Add, subtract, multiply or divide two fractions or mixed numbers and get the answer in lowest terms, with the steps.
Percentage Calculator
Find X% of Y, what percent X is of Y, the whole when X is P% of it, or the percent change between two values.
Triangle Calculator
Solve any triangle from sides and angles using the law of sines and cosines.
Volume Calculator
Calculate the volume of spheres, ellipsoids, cones, cylinders, cubes, rectangular prisms and pyramids.
Standard Deviation Calculator
Calculate population or sample standard deviation for any dataset.
Random Number Generator
Generate up to 100 random whole numbers or decimals in any range, with or without repeats.
Number Sequence Calculator
Generate arithmetic, geometric or Fibonacci sequences with the nth term and the sum.
Percent Error Calculator
Calculate the signed or unsigned percent error between an observed and true value, or the percent difference between two values.
Exponent Calculator
Raise a base to a whole, decimal or negative exponent, in full digits and in scientific notation.
Binary Calculator
Convert a binary number to decimal, octal and hex, or a decimal number to binary, octal and hex, and add, subtract, multiply or divide in binary.
Hex Calculator
Convert a number between hexadecimal, decimal, binary, and octal, and add, subtract, multiply or divide in hex.
Half-Life Calculator
Solve the half-life formula for the amount left, the half-life, the elapsed time or the starting quantity.
Quadratic Formula Calculator
Find the roots of any quadratic equation ax² + bx + c = 0.
Slope Calculator
Find the slope, distance, angle, and equation of a line through two points, or the point-slope form from a point and a slope.
Log Calculator
Calculate logarithms with any base.
Area Calculator
Calculate the area of rectangles, triangles, circles, sectors and more.
Sample Size Calculator
Find the sample size a survey needs from its confidence level, margin of error, expected proportion and, if you know it, the population size.
Probability Calculator
Calculate probabilities for single events, unions, independent intersections, conditional events, binomial trials and the normal distribution.
Statistics Calculator
Compute descriptive statistics for any dataset, plus any percentile, the quartiles, IQR and five-number summary by the inclusive or exclusive method.
Mean, Median, Mode Calculator
Calculate the mean, median, mode, and range of a dataset.
Permutation and Combination Calculator
Calculate nPr (permutations) and nCr (combinations).
Z-score Calculator
Calculate the z-score of a value or the raw score from a z-score, and the share of a normal distribution below and above it.
Confidence Interval Calculator
Find a confidence interval for a mean or a proportion at any confidence level, with the margin of error and the t or z critical value.
Ratio Calculator
Solve the proportion A : B = C : D for D, simplify a ratio to lowest terms, compare two ratios or split a total in a ratio.
Distance Calculator
Find the straight-line distance between two points in 2D or 3D, with the formula worked out, or the great-circle distance between latitude and longitude coordinates.
Circle Calculator
Solve a circle from its radius, diameter, circumference or area, and a sector from an angle.
Surface Area Calculator
Calculate the surface area of 3D shapes.
Pythagorean Theorem Calculator
Find any side of a right triangle using the Pythagorean theorem.
Right Triangle Calculator
Enter the two legs of a right triangle to get the hypotenuse, both acute angles, the area, the perimeter and the altitude to the hypotenuse.
Law of Sines Calculator
Solve a triangle from two angles and a side (AAS, ASA) or two sides and an opposite angle (SSA) with a/sin A = b/sin B = c/sin C.
Law of Cosines Calculator
Solve a triangle from two sides and the angle between them (SAS) or from three sides (SSS) with c² = a² + b² − 2ab·cos C.
Root Calculator
Calculate square, cube, or any nth root, and simplify the radical.
Least Common Multiple Calculator
Find the LCM of two or more positive whole numbers.
Greatest Common Factor Calculator
Find the GCF (GCD) of two or more positive whole numbers.
Factor Calculator
Find all factors of a whole number from 1 to 1 trillion.
Rounding Calculator
Round a number to decimal places or significant figures: half up, half down, half to even, up, down and truncated.
Matrix Calculator
Add, subtract, multiply or transpose rectangular matrices up to 6×6, or find a determinant or inverse.
Scientific Notation Calculator
Convert numbers to/from scientific notation and perform arithmetic.
Big Number Calculator
Add, subtract, multiply, divide or take the remainder of whole numbers up to 100,000 digits long, raise to a power or find a factorial, with every digit exact.
Prime Factorization Calculator
Write a whole number as a product of primes with exponents, and list its distinct primes.
Common Factor Calculator
List every common factor of two or more positive whole numbers, with the greatest one.
Basic Calculator
Four-function keypad with parentheses for everyday arithmetic.
Long Division Calculator
Step-by-step long division with work shown.
Average Calculator
Calculate the mean (average) of any list of numbers.
P-value Calculator
Find the p-value of a z-score, a t-score, a chi-square statistic or an F statistic.