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

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

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

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

Conversion between wind speed measurement units including Beaufort numbers, km/h, m/s, mph, fps.

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

- Conversion of fractional numbers between numeral systems
This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.

- Conversion of pounds into inches
Conversion of old pounds artillery caliber into more modern inches and millimeters

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

- Digital image size in pixels and photo print size
This article is about relation between image size in pixels and photographic print size. First, it recommends photographic print size for given digital image dimensions in pixels. Second, it finds resulting pixels per inch value for printed digital image with known linear and pixel dimensions.

- Dimensiones de pantalla y proporción de aspecto
Esta calculadora en línea encuentra dimensiones de pantalla - altura y ancho, dado el valor diagonal y proporción de aspecto.

Binary, one's complement (inverse) and two's complement codes (calculator was created by user's request)

- Imperial to Metric and Metric to Imperial measures of length converter
- Math operations on degrees
This online calculator supports simple mathematical operations, addition/subtraction/multiplication/division, on degrees

- Meters per second and kilometers per hour
This simple calculator convert meters per second to kilometers per hour and vice versa

- Nautical measurement units
Nautical mile, sea mile, cable

- Number of days in a year
- Number of flagstones to units of area and vice versa
These calculators convert entered number of flagstones to area size and vice versa - calculate number of flagstones needed to cover entered ara size. Metric and imperial units are supported

- Pressure units converter
Calculator which converts units of pressure