Hectares to Acres

A hectare is a metric unit of land area, while an acre is a customary unit used in countries such as the United States and the UK. The factor 2.47105 comes from the fixed relationship between the two area units: 1 hectare is defined as 10,000 square metres, and that area equals about 2.47105 acres. Multiplying hectares by 2.47105 converts the same land area into acres without changing the actual size of the land.

Use this conversion when comparing farm, real-estate, forestry, or land-planning measurements that mix metric and imperial units. It is especially useful when land sizes are given in hectares but need to be reported or compared in acres.

• Using the wrong direction and dividing by 2.47105 instead of multiplying
• Rounding too early and losing accuracy in the final acreage
• Confusing hectares with square kilometres or with acres per hectare