About Units

Square kilometer: A square kilometer is a unit of area in the metric system. It is equal to 1,000,000 square meters or approximately 0.3861 square miles. This unit is commonly used to measure large areas such as geographical regions, city extents, or country sizes. One square kilometer is roughly equivalent to 247 acres.

Square miles: A square mile is a unit of area in the imperial and US customary systems. It is equal to 640 acres or approximately 2.59 square kilometers. Square miles are typically used to measure larger areas, such as the size of cities, counties, or large natural features like lakes and forests.