At 1.00 ha this is a small farm. A typical small UK farm runs 10-50 ha; a US family farm averages around 180 ha.
1 hectare = 2.471054 acres exactly (international definition). The conversion factor is exact to 10 significant figures.
Hectares are the standard unit in most of the world for land registration and agricultural reporting. Acres remain the standard in the United States, United Kingdom (informal), and several Commonwealth countries.
Next stepFor an irregular plot, measure each sub-section separately and sum the hectare values before converting.