Area units calculator & converter tool
Km2 Conversions Table
Equivalent of 4 km2 (Square Kilometer): |
4000000 m2 (Square meter) |
40000000000 cm2 (Square centimeter) |
400000000 dm2 (Square decimeter) |
4000000000000 mm2 (Square milimeter) |
400 Hectare |
40000 Are |
4000 Decare |
4000000 Centiare |
1170.02 Arpent |
4000000000 Barn |
43055600 Square feet |
988.42 Acre |
158147.6 Square perche |
1.5444 Square mil |
4783960 Square yard |
6200018510.385 Square inch |
0.04292 Canton |
6.176 Homestead |
3953.6 Rood |
Km2 / Are Units Definition
km2 (Square Kilometer)
The square kilometer (km2) is a unit of measurement of area. One square kilometer is equal to the area of a square whose sides measure one kilometer.
Are
Are, unit of area in the metric system, equal to 100 square meters and the equivalent of 0.0247 acre. Its multiple, the hectare (equal to 100 ares), is the primary unit of land measurement for most of the world. The are was the basic unit of area when the metric system was first decreed in France in 1795. When the International System of Units (SI) was adopted in 1960, the square meter replaced the are as the unit of area, but the International Bureau of Weights and Measures accepted the hectare as the common unit that can be used with the SI.