Math Calculators
Algebra, geometry, statistics and number tools, every one with the steps shown.
Area Calculator
Calculate the area of rectangles, triangles, circles and trapezoids.
Basic Calculator
A simple calculator for addition, subtraction, multiplication and division.
Big Number Calculator
Add, subtract or multiply integers of unlimited size, exactly.
Circle Calculator
Find the radius, diameter, circumference and area of a circle from any one value.
Common Factor Calculator
List every factor shared by two or more numbers.
Confidence Interval Calculator
Calculate a confidence interval for a sample mean.
Distance Calculator (Coordinates)
Calculate the straight-line distance between two points.
Exponent Calculator
Calculate a base raised to a power, including negative and fractional exponents.
Factor Calculator
List all the factors (divisors) of a whole number.
Fraction Calculator
Add, subtract, multiply or divide two fractions and simplify the result.
GCF & LCM Calculator
Find the greatest common factor and least common multiple of a list of numbers.
Half-Life Calculator
Calculate the remaining amount of a substance after radioactive/exponential decay.
Log Calculator
Calculate the logarithm of a number for any base, including natural log.
Long Division Calculator
Divide two numbers and see the quotient and remainder.
Matrix Calculator (2×2)
Add, subtract, multiply, or find the determinant/inverse of 2×2 matrices.
Mean, Median, Mode & Range Calculator
Calculate the mean, median, mode and range of a set of numbers.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
Number Sequence Calculator
Generate an arithmetic or geometric sequence and its sum.
P-Value Calculator
Calculate the one-tailed and two-tailed p-value for a z-score.
Percent Error Calculator
Calculate the percent error between an experimental and theoretical value.
Percentage Calculator
Find a percentage of a number, what percent one number is of another, or percent change.
Permutation & Combination Calculator
Calculate nPr (permutations) and nCr (combinations).
Prime Factorization Calculator
Break a number down into its prime factors.
Probability Calculator
Calculate a single event's probability, or the combined probability of two independent events.
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 for x.
Ratio Calculator
Simplify a ratio, or solve a proportion A:B = C:D for the missing value.
Right Triangle Calculator
Solve a right triangle's sides and angles from two known values.
Root Calculator
Calculate the nth root of a number.
Rounding Calculator
Round a number to a chosen number of decimal places.
Sample Size Calculator
Calculate the survey sample size needed for a target margin of error.
Scientific Calculator
A real button-based scientific calculator with memory, trig, logs and more.
Scientific Notation Calculator
Convert a number to and from scientific notation.
Simple Calculator
A real button calculator for everyday arithmetic, with memory keys.
Slope Calculator
Calculate the slope and equation of a line through two points.
Standard Deviation Calculator
Calculate population and sample standard deviation from a data set.
Statistics Calculator
Get mean, median, mode, range, variance and standard deviation from a data set.
Surface Area Calculator
Calculate the surface area of a cube, box, sphere, cylinder or cone.
Triangle Calculator
Find the angles, area and perimeter of a triangle from its three side lengths.
Volume Calculator
Calculate the volume of a cube, box, sphere, cylinder or cone.
Z-score Calculator
Calculate a z-score and its percentile in a normal distribution.