Standard Deviation Calculator
Calculate mean, population deviation and sample deviation for a number set.
Math Tools
Solve frequently searched arithmetic, algebra and statistics problems locally.
Prime Number Checker
Check whether a positive whole number is prime.
GCD and LCM Calculator
Find the greatest common divisor and least common multiple of two integers.
Factorial Calculator
Calculate the factorial of a non-negative integer.
Permutation and Combination Calculator
Calculate ordered permutations and unordered combinations.
Quadratic Formula Calculator
Solve real or complex roots of a quadratic equation.
Circle Calculator
Calculate diameter, circumference and area from a radius.
Triangle Area Calculator
Calculate triangle area from base and perpendicular height.
Pythagorean Theorem Calculator
Find a right triangle hypotenuse from two perpendicular sides.
Distance Formula Calculator
Find straight-line distance between two Cartesian points.
Slope Calculator
Calculate slope between two coordinate points.
Scientific Notation Converter
Write a decimal number in normalized scientific notation.
Number to Roman Numeral Converter
Convert a whole number from 1 to 3,999 into Roman numerals.
Z-Score Calculator
Calculate how many standard deviations a value lies from the mean.
Percent Error Calculator
Calculate absolute percentage error between observed and accepted values.
Weighted Average Calculator
Calculate a mean using matching values and weights.
Exponent Calculator
Calculate a base raised to an exponent.
Square Root Calculator
Calculate principal square root and nearest perfect squares.
Rectangle Calculator
Calculate rectangle area, perimeter and diagonal.
Trapezoid Area Calculator
Calculate trapezoid area from parallel sides and height.
Parallelogram Area Calculator
Calculate parallelogram area and perimeter.
Rhombus Area Calculator
Calculate rhombus area from its diagonals.
Sphere Calculator
Calculate sphere volume and surface area from radius.
Cylinder Calculator
Calculate cylinder volume and total surface area.
Cone Calculator
Calculate cone volume, slant height and surface area.
Cube Calculator
Calculate cube volume, surface area and diagonal.
Rectangular Prism Calculator
Calculate box volume, surface area and diagonal.
Regular Polygon Calculator
Calculate regular polygon area and perimeter.
Polygon Interior Angle Calculator
Calculate interior-angle sum and each angle of a regular polygon.
Linear Equation Solver
Solve an equation in the form ax + b = 0.
Simultaneous Equations Solver
Solve two linear equations in two unknowns.
Logarithm Calculator
Calculate a logarithm with any valid base.
Median Calculator
Find the median and sorted middle values of a number list.
Mode Calculator
Find the most frequently occurring values in a number list.
Quartile Calculator
Calculate minimum, Q1, median, Q3 and maximum.
Geometric Mean Calculator
Calculate the geometric mean of positive numbers.
Harmonic Mean Calculator
Calculate the harmonic mean of positive rates or ratios.
Prime Factorization Calculator
Break a positive whole number into prime factors.