Download Calc98, a Windows software that performs scientific, engineering, and financial calculations. Read the guide to scientific calculators.

Supplies an extended index of units that can be converted, including flux and thermal resistance. Intended for more advanced study.

Play around with this online computation device and calculate Isentropic Flow Relations and Shock Relations.

Resource for engineers offers engineering and scientific unit conversion calculators as well as tables of constants.

Table provides the decimal equivalents for commonly used fractions.

Web-based calculator converts decimal degrees to degrees, minutes and seconds, and vice versa.

Calculator computes approximate transformer requirements for one neon tube or a series of tubes (of different diameters and/or gases).

JavaScript program provides solar angles based on location, date and time. Find declination, local solar time and time of sunrise and sunsets.

Convert Celsius to Fahrenheit, Kelvin to Reaumur, Reaumur to Rankine, and all other combinations using this tool.

Table, based on basic and derived units, converts values for weight, distance, atmosphere and other measurements used in engineering.

Download this unit-conversion software that can convert from units such as area, force, temperature, length, flow, mass, energy and velocity.