- Combinatorics. Generator of combinations.
Combinatorics. Generator of combinations of m from n.

- Complex fraction
This online calculator evaluates arithmetic expressions with common or complex fractions.

- Cone
- Converting degrees to radians
Converts radians to degrees, minutes and seconds

- Counting pipes from the end face
The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request

Calculator of right circular cone / truncated right circular cone development

- Cramer's Rule
This online calculator solves system of linear equations using Cramer's rule and shows detailed steps of the solution

- Cryptarithmetic puzzle solver
This calculator is a solver of cryptarithmetic puzzles. Cryptarithmetic puzzle is a number puzzle in which a group of arithmetical operations has some or all of its digits replaced by letters or symbols, and where the original digits must be found. In such a puzzle, each letter represents a unique digit.

- Cube
- Cubic equation
Solution of cubic equation using Vieta's formulae. Created by user request

- Cylinder
- Cylindrical tank volume
Cylindrical tank volume

This calculator calculates the determinant of 3x3 matrices

- Derivative calculator
Online calculator which determines first derivative of a function

- Determinant of a matrix
This online calculator computes determinant of a matrix, using it's definition

- Ellipsoid
Calculates ellipsoid and spheroid volume and surface area.

- Evaluating expressions
This online calculator substitutes a specific value for each variable, and performs the operations, evaluating the given expression.

- Extended Euclidean algorithm
This calculator implements Extended Euclidean algorithm, which computes, besides the greatest common divisor of integers a and b, the coefficients of Bézout's identity

- Factorial
Online calculator computes factorial of given positive integer (up to 170!)

- Factoring calculator
This calculator generates all pairs of factors for given integer.

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