Length Converter is a conversion calculator that can quickly and easy translate 36 units of length into 1260 conversions. Single and Multiple Converter available. Automatic calculations with accurate conversions. Metric, Imperial, Marine, Aviation, Surveying & Scientific Units of Length. Units of measurement: • Millimeter (mm) • Centimeter (cm) • Inch (in) • Foot (ft) • Yard (yd) • Meter (m) • Rod • Chain • Kilometer (km) • Mile (mi) • Nautical Mile (nmi) • Fathom • Tho