Megameter to Nautical Mile Converter

A megameter (Mm) is a unit of length in the metric system equal to one million meters (10⁶ m). It is commonly used to measure very large distances, particularly in astronomy and geography.

The megameter was introduced as part of the metric system's decimal-based approach to measurement. The prefix 'mega-' comes from the Greek word 'megas' meaning 'great' or 'large', and was officially adopted in 1960 as part of the International System of Units (SI).

Megameters are primarily used in scientific contexts, particularly in astronomy for measuring distances between celestial bodies within our solar system, and in geography for measuring very large terrestrial distances such as the diameter of planets or the distance between continents.

A nautical mile is a unit of length used in navigation, equal to exactly 1,852 meters or approximately 1.151 statute miles. It is based on the Earth's circumference and is defined as one arc minute of latitude.

The nautical mile originated from the need for a unit of distance that related to the Earth's geometry for navigation purposes. It was historically defined as one minute of arc along a meridian of the Earth. The international nautical mile was standardized at exactly 1,852 meters in 1929.

Nautical miles are universally used in maritime and aviation navigation worldwide. They're the standard unit for measuring distances at sea, flight distances, territorial waters, and exclusive economic zones. Speed in nautical miles per hour is called a knot.