Powerful, quick and accurate unit converter. AccelWare Unit Conversion Tool is a powerful, intuitive and easy-to-use utility for quick and accurate conversion between almost every possible units of measure, from one system to another. The latest version includes more than 2200 units in 78 conversion tables. The categories include: length, weight, speed, mass, numbers, volume, time, density, force, pressure, energy, power, flow, temperature, angle, light, fractions, viscosity and many more.