# All online calculators

- Commission calculator
This online calculator finds the commission from the sale price and the commission rate, the sale price from the commission and the commission rate, and the commission rate from the sale price and the commission

- Comparing prices using cost per square meter
This calculator helps to compare prices by calculating cost per square meter

- 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.

- 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.

- Complementary color
This calculator shows complementary colors for entered colors

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

- Complex numbers
The calculator displays complex number and its conjugate on the complex plane, evaluate complex number absolute value and principal value of the argument . It also demonstrates elementary operations on complex numbers.

- Complex polynomial value calculation
The calculator evaluates polynomial value. The polynomial coefficients can be either real or complex.

- Compound interest
This calculator computes compound interest

- Compound interest at certain number of days
- Compound interest with an equal monthly investment
The calculation of the accumulated amount with the monthly investiment

- 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

- Conversion between any bases
This calculator converts number from one numeral system to another, given both system's bases

- Conversion between imperial and metric units of area
These calculators convert imperial to metric and metric to imperial units of square

- Conversion between metric units of length and old Russian system of measures units of length
The calculators in this article convert units of length from old Russian system of measures units to metric units and back.

- Conversion from decimal numeral system
This calculator converts given decimal value to other positional numeral system

- Conversion of decimal number to other notations
This calculator converts decimal number to binary, hexadecimal and octal notations