Free online calculators for home, office and school. Mortgage, math, loan, finance, scientific, health and sports calculators.

Tool offers memory functions, a tape display, English-metric conversions, and a scientific expression evaluator.

Browse this collection of converters for commonly-used systems such as metric and more exotic systems, including Roman and ancient Russian.

Converts various units of measurement, supplies examples and sample conversions, and presents trivia about measurement.

Chart supplies conversion factors of weights and measurements in English and metric units, from acres to hectares and watts to horsepower.

Provides a free conversion program for use with distance, temperature, volume, time, power, density, pressure and other calculations.

Handles all standard measurements as well as converting and calculating units of mass, weight, volume, length, time, pressure and more.

Use various conversion tables to find values for acceleration, area, energy, power, velocity, volume, metrology, pressure and temperature.

Web directory offers online tools for temperature conversion, area and length calculations, and determining space requirements.

Find calculators that will perform conversions between almost every measurement type imaginable, from science to cooking to math.

Thomas Dildine offers links to every imaginable conversion, from calories to time, to a death-clock to compressible aerodynamics.