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 / Acre 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.
Acre
The acre (/ˈeɪkər/ AY-kər) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, 1⁄640 of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. Based upon the international yard and pound agreement of 1959, an acre may be declared as exactly 4,046.8564224 square metres. The acre is sometimes abbreviated ac but is usually spelled out as the word "acre".