Square Kilometer (km²)
Definition: A square kilometer (km²) is a metric unit of area equal to a square with sides of one kilometer.
History: Adopted with the metric system, it replaced traditional units like square miles in many countries for land measurement.
Current Use: Used in geography, land surveying, and environmental studies to measure large land areas.
Acre (ac)
Definition: An acre is an imperial unit of area equal to 4,047 square meters or 0.4047 hectares.
History: Historically, an acre represented the area a team of oxen could plow in a day. It was formalized over centuries.
Current Use: Still widely used in the US and UK for real estate, agriculture, and land ownership.
Quick Conversion Table Square Kilometer (km²) to Acre (ac)
1 Square Kilometer (km²) equal to 247.1053815 Acre (ac)
5 Square Kilometer (km²) equal to 1,235.5269073 Acre (ac)
10 Square Kilometer (km²) equal to 2,471.0538147 Acre (ac)
20 Square Kilometer (km²) equal to 4,942.1076293 Acre (ac)
30 Square Kilometer (km²) equal to 7,413.161444 Acre (ac)
50 Square Kilometer (km²) equal to 12,355.2690734 Acre (ac)
75 Square Kilometer (km²) equal to 18,532.90361 Acre (ac)
100 Square Kilometer (km²) equal to 24,710.5381467 Acre (ac)