Math
441 tools · page 2 of 8
- Circle Calculator Calculate a circle’s area, circumference and diameter from its radius.
- Cone Volume Calculator Calculate a cone’s volume, surface area and slant height from its radius and height.
- Distance Between Coordinates Calculate the great-circle distance between two latitude/longitude points.
- Nth Fibonacci Number Calculator Calculate the nth Fibonacci number.
- Bitwise Calculator Compute bitwise AND, OR and XOR of two integers.
- Number Base Converter Convert a number between binary, octal, decimal and hexadecimal bases.
- Sum Calculator Add up a list of numbers and count them.
- Digit Sum & Digital Root Calculator Calculate the digit sum and digital root of a number.
- Geometric Mean Calculator Calculate the geometric mean of a list of numbers.
- Harmonic Mean Calculator Calculate the harmonic mean of a list of positive numbers, entered separated by commas or spaces. The harmonic mean is the reciprocal of the average of reciprocals — useful for rates and ratios.
- Quadratic Equation Solver Find the roots and discriminant of a quadratic equation from coefficients a, b and c (including complex roots).
- Factorial Calculator Calculate the factorial n! of a whole number.
- 2D Vector Calculator Calculate the magnitude and direction angle of a 2D vector from its x and y components.
- 3×3 Determinant Calculator Calculate the determinant of a 3×3 matrix.
- Divisor Count Calculator Enter any whole number and instantly see all of its divisors, how many there are, and the sum of those divisors. Handy for math homework, factoring, and number theory.
- Law of Cosines Calculator Finds the third side of a triangle from two sides and the included angle, plus the other two angles and the area.
- Perfect Number Checker Check if a number is perfect, abundant or deficient.
- Primorial Calculator Calculate the primorial: the product of all prime numbers less than or equal to n.
- Square Calculator Calculate the area, perimeter and diagonal of a square from its side.
- Lucas Number Calculator Calculate the nth Lucas number (the sequence 2, 1, 3, 4, 7, 11 …) related to the Fibonacci numbers.
- Square Root Calculator Calculate the square root and cube root of a number.
- Triangle Angles Calculator Calculate all three angles of a triangle from its side lengths (law of cosines).
- Cone Surface Area Calculator Calculate the total and lateral surface area and slant height of a cone.
- Armstrong Number Checker Check whether a number is an Armstrong (narcissistic) number — equal to the sum of its digits each raised to the digit count.
- Decimal to Fraction Converter Convert a decimal number into a reduced fraction.
- Significant Figures Calculator Count the significant figures in any number and round it to a target number of significant figures. Handles decimals, leading and trailing zeros, and scientific notation.
- Tribonacci Number Calculator Calculate the nth Tribonacci number, where each term is the sum of the previous three.
- Exponent Calculator Raise a base number to any exponent (power).
- Happy Number Checker Check whether a number is a happy number — repeatedly summing the squares of its digits reaches 1.
- Ellipse Area & Perimeter Calculate an ellipse’s area and approximate circumference from its two semi-axes.
- Rounding Calculator Round a number to a chosen number of decimal places.
- Complex Number Modulus Calculator Calculate the modulus and argument of a complex number.
- Linear Interpolation Calculator Interpolate a value on the straight line between two known points (x1,y1) and (x2,y2).
- Octahedron Calculator Calculate the volume and surface area of a regular octahedron from its edge length.
- Pell Number Calculator Calculate the nth Pell number (0, 1, 2, 5, 12, 29 …), used in approximating √2.
- Regular Pentagon Area Calculator Calculate the area and perimeter of a regular pentagon from its side length.
- Nth Root Calculator Calculate the nth root (square, cube, or any degree) of a number.
- Completing the Square Calculator Rewrites a quadratic ax²+bx+c in vertex form a(x−h)²+k by completing the square and gives the vertex.
- Modular Inverse Calculator Calculate the modular multiplicative inverse of a modulo m with the extended Euclidean algorithm.
- Regular Polygon Calculator Calculate the perimeter and area of a regular polygon from its number of sides and side length.
- Sphere Surface Area Calculator Calculate the surface area and volume of a sphere from its radius.
- Triangular Number Calculator Calculate the nth triangular number.
- Cylinder Volume Calculator Calculate a cylinder’s volume and surface area from its radius and height.
- Kaprekar's Routine Calculator Run Kaprekar's routine on a 4-digit number and count the steps to reach the constant 6174.
- Proportion Solver (a/b = c/x) Find the unknown x in the proportion a/b = c/x by cross-multiplication.
- Tetrahedral Number Calculator Calculate the nth tetrahedral number — the count of spheres in a triangular pyramid of n layers.
- Triangular Prism Volume Calculator Calculate the volume of a triangular prism from its triangle base, height and length.
- Sphere from Volume Calculator Calculate a sphere's radius, diameter and surface area from its volume.
- Catalan Number Calculator Calculate the nth Catalan number, counting balanced parentheses, paths and triangulations.
- Ellipse Perimeter Calculator Calculate the perimeter (using Ramanujan's approximation) and area of an ellipse from its two axes.
- Regular Hexagon Area Calculator Calculate the area and perimeter of a regular hexagon from its side length.
- Abundant / Perfect / Deficient Number Checker Classify a number as abundant, perfect or deficient based on the sum of its proper divisors.
- Amicable Numbers Checker Find a number's aliquot partner and check whether the two form an amicable pair.
- Hemisphere Calculator Calculate the volume and surface area of a hemisphere.
- Regular Octagon Area Calculator Calculate the area and perimeter of a regular octagon from its side length.
- Right Triangle Calculator Calculate the hypotenuse, area and perimeter of a right triangle from its two legs.
- Harmonic Number Calculator Calculate the nth harmonic number, the sum of reciprocals from 1 to n.
- Sine Calculator Calculate the sine of an angle entered in either degrees or radians.
- Angle Converter Convert angles between degrees, radians and gradians.
- Prime Number Checker Check whether a number is prime and see its prime factorization.