Convert Square Mile to Square Kilometer

One sq mi equals 2.58998811 km². This converter allows you to easily convert between Square Mile and Square Kilometer in real time.

Formula

sq mi × 2.58998811 = km²

Example: 1 sq mi = 2.58998811 km²

What is Square Mile?

The square mile is a unit of area in the imperial and US customary systems, equal to a square with sides of one mile, or exactly 640 acres. In the United States and United Kingdom, it is used for the areas of counties, states, cities, and other large regions. Manhattan Island in New York City covers about 23 square miles, and the City of London is just 1.12 square miles. Population density figures in English-speaking countries are typically given as persons per square mile.

What is Square Kilometer?

The square kilometer is a unit of area equal to a square with sides of one kilometer, or 1,000,000 square meters. It is the standard unit for expressing the area of countries, states, cities, and large geographical features. For example, France covers approximately 640,000 km² and Tokyo spans about 2,194 km². In geography, environmental science, and urban planning, square kilometers are used for land-use analysis, forest coverage, and natural reserve boundaries.