Acres to Hectares: Formula, Chart and What the Sizes Look Like

Land is measured in hectares nearly everywhere and in acres across the US, UK farming and Commonwealth property markets.

The formula hectares = acres × 0.404686 acres = hectares × 2.47105

A hectare is exactly 10,000 m² — a 100 m by 100 m square. An acre is 4,046.86 m², historically the area one ox team could plough in a day.

Chart 1 acre = 0.405 ha. 2.5 acres ≈ 1 ha. 5 acres = 2.02 ha. 10 acres = 4.05 ha. 50 acres = 20.23 ha. 100 acres = 40.47 ha. 640 acres (1 square mile) = 258.999 ha.

Getting a feel for it A full-size football pitch is roughly 0.7 ha, or 1.76 acres. A hectare is therefore about 1.4 pitches. An acre is a rectangle roughly 64 m by 64 m.

Other land units you may hit A rood is a quarter-acre. A square perch is 25.29 m². In India, a bigha varies by state between roughly 0.06 and 0.4 ha — always ask locally which definition applies before converting.