Length Converter

First convert feet to inches (multiply feet by 12, add the remaining inches). Then multiply total inches by 2.54 to get centimetres. For example, 5 ft 10 in = (5 × 12 + 10) × 2.54 = 70 × 2.54 = 177.8 cm.

The US is one of three countries (with Liberia and Myanmar) that have not officially adopted the metric system. Metrication has been attempted multiple times but never fully implemented due to economic costs, cultural resistance, and the scale of converting infrastructure. Science and medicine in the US do use metric units.

A nautical mile is 1,852 metres, defined as one minute of arc along a meridian of the Earth. It is used in aviation and maritime navigation because it relates directly to geographic coordinates — one nautical mile corresponds to one arcminute of latitude.