A simple and easy-to-use distancelength unit converter.
Adding and Subtracting Units of Length
This app is free of charge.
Available unit conversions include:

meter (m)
gigameter (Gm)
megameter (Mm)
kilometer (km)
hectometer (hm)
dekameter (dam)
decimeter (dm)
centimeter(cm)
millimeter (mm)
micrometer
micron
nanometer (nm)
yard (yd)
foot (ft)
inch (in)