Area units calculator & converter tool
Mm2 Conversions Table
Equivalent of 18 mm2 (Square milimeter): |
1.8E-5 m2 (Square meter) |
0.18 cm2 (Square centimeter) |
0.0018 dm2 (Square decimeter) |
1.8E-11 km2 (Square Kilometer) |
1.8E-9 Hectare |
1.8E-7 Are |
1.8E-8 Decare |
1.8E-5 Centiare |
5.26509E-9 Arpent |
0.018 Barn |
0.0001937502 Square feet |
4.44789E-9 Acre |
7.116642E-7 Square perche |
6.9498E-12 Square mil |
2.152782E-5 Square yard |
0.027900083296733 Square inch |
1.9314E-13 Canton |
2.7792E-11 Homestead |
1.77912E-8 Rood |
Mm2 / Hectare Units Definition
mm2 (Square milimeter)
Unit of area measurement equal to a square with a side of one millimeter. Abbreviations: mm2, mm².
Hectare
hectare, unit of area in the metric system equal to 100 ares, or 10,000 square meters, and the equivalent of 2.471 acres in the British imperial system and the customary measurement of the United States. The term is derived from the Latin area and hect, an irregular contraction of the Greek word percent. Although the are is the primary metric unit of land measurement, the hectare is more commonly used in practice. The hectare is, by definition, equal to one djerib in Turkey, one jerib in Iran, one gong qing in mainland China, one manzana in Argentina and one bunder in the Netherlands.