Area units calculator & converter tool
Mm2 Conversions Table
Equivalent of 20 mm2 (Square milimeter): |
2.0E-5 m2 (Square meter) |
0.2 cm2 (Square centimeter) |
0.002 dm2 (Square decimeter) |
2.0E-11 km2 (Square Kilometer) |
2.0E-9 Hectare |
2.0E-7 Are |
2.0E-8 Decare |
2.0E-5 Centiare |
5.8501E-9 Arpent |
0.02 Barn |
0.000215278 Square feet |
4.9421E-9 Acre |
7.90738E-7 Square perche |
7.722E-12 Square mil |
2.39198E-5 Square yard |
0.031000092551925 Square inch |
2.146E-13 Canton |
3.088E-11 Homestead |
1.9768E-8 Rood |
Mm2 / Perche2 Units Definition
mm2 (Square milimeter)
Unit of area measurement equal to a square with a side of one millimeter. Abbreviations: mm2, mm².
Square perche
A square perch (often shortened to just a perch) is a unit of measurement and is equal to 25.29285264 square metres. Confusingly, a perch (not the squared
variety) is also called a rod or pole because it’s based on a surveyor’s tool
measuring exactly 5½ yards or 16½ feet or ¼ of a surveyor’s chain. The perch or rod was helpful tool and measurement for a surveyor because it could be used to create a ‘perfect’ acre of 40 perches by 4 perches – remember 160 perches equals an acre.