Square Millimeter (mm²)
Definition: A square millimeter (mm²) is a very small unit of area, representing a square with sides of one millimeter.
History: Developed alongside the metric system, it became essential in engineering and micro-measurements.
Current Use: Used in material science, precision engineering, and biological studies.
Hectare (ha)
Definition: A hectare (ha) is a metric unit of area equal to 10,000 square meters.
History: Introduced in 1795 as part of the metric system, replacing traditional agricultural land measurements.
Current Use: Widely used in agriculture, forestry, and real estate for large land measurements.
Quick Conversion Table Square Millimeter (mm²) to Hectare (ha)
1 Square Millimeter (mm²) equal to 1.0e-10 Hectare (ha)
5 Square Millimeter (mm²) equal to 5.0e-10 Hectare (ha)
10 Square Millimeter (mm²) equal to 1.0e-9 Hectare (ha)
20 Square Millimeter (mm²) equal to 2.0e-9 Hectare (ha)
30 Square Millimeter (mm²) equal to 3.0e-9 Hectare (ha)
50 Square Millimeter (mm²) equal to 5.0e-9 Hectare (ha)
75 Square Millimeter (mm²) equal to 7.50e-9 Hectare (ha)
100 Square Millimeter (mm²) equal to 1.0e-8 Hectare (ha)