- Cartesian and polar two-dimensional coordinate systems
This online calculator converts polar coordinates to cartesian coordinates and vice versa.

- Celsius to Fahrenheit calculator explained
- Chande momentum oscillator indicator
Description of Chande momentum oscillator indicator, drawing a graph on candles

- Chemical equation balance
This online calculator balances equations of chemical reactions.

- Circle formulae
Circle formulae

- Circular sector
Calculates area, arc length, perimeter and center of mass of circular sector

This online calculator determines the radius and area of the circumcircle of a triangle given the three sides

- Circular segment
Can calculate area, arc length,chord length, height and perimeter of circular segment by radius and angle.

- Clapeyron-Mendeleev equation. The relationship between the number of moles of gas, the temperature, volume and pressure.
Clapeyron-Mendeleev equation. The relationship between the number of moles of gas, the temperature, volume and pressure.

- Combinatorics. Combinations, arrangements and permutations
This calculator calculates number of combinations, arrangements and permutations for given n and m

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

- Compass point between two locations
Given coordinates of two locations in decimal degrees, this calculator displays constant azimuth, distance and compass points for different compass roses.

These calculators convert imperial to metric and metric to imperial units of square

- Compass Points
The calculator gives name of compass point by direction angle in degrees.

- Compass, magnetic and true course.
Calculates true, magnetic and compass direction(course, bearing) by given direction, magnetic declination and deviation.

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

- Compound interest
This calculator computes compound interest

- Compound interest. Arbitrary payment
Compound interest calculator with the possibilityto set all the parameters of the compound interest formula

- Cone
- Cone development
Calculator of right circular cone / truncated right circular cone development

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