Multiply acres by 0.404686
1 acre equals 4046.8564 square metres exactly, derived from the historical chain measurement: 10 square chains, where 1 chain = 22 yards = 20.1168 m. 1 hectare equals 10,000 m² by definition (1 hm² = (100 m)²). Dividing gives 0.40469 hectares per acre, or 2.4711 acres per hectare. ConvertBuddy uses 0.4047, accurate to four decimal places — sufficient for any property or agricultural use.
Acres and hectares both measure area, especially for land. The acre is an imperial unit of historical origin, defined today as 4046.86 square metres. The hectare is a metric unit, exactly 10,000 square metres (a square 100 m on each side).
One acre equals 0.4047 hectares — close to a clean 'two acres per hectare' rule of thumb. The acre dominates US real estate and agriculture; the hectare dominates metric-system farming, forestry, and EU agricultural-policy paperwork.
The conversion comes up in international land transactions, comparing farm sizes across borders, reading agricultural-yield papers, and translating American property listings for non-US audiences.
Property listings in Europe, Australia, and most of Asia quote land area in hectares. US listings use acres. Convert when comparing parcel sizes across regions for vacation, retirement, or investment property.
USDA and FAO statistics use different default units. Crop yield papers from the US list bushels per acre; international ones list kg per hectare. Convert to compare farm productivity across regions on a single basis.
European wine regions classify vineyards by hectare; California vineyards by acre. Converting helps compare estate sizes when reading wine-region literature or planning vineyard purchases.
Timber-harvest plans and conservation easements use hectares in Canada and Europe, acres in the US. Convert when bidding on timber rights or estimating reforestation budgets.
Utility-scale solar projects quote land use in hectares globally except the US, where acres remain standard. Convert when comparing project density (MW per area unit) across markets.
Multiply acres by 0.4047. So 1 acre = 0.4047 ha, 5 acres = 2.02 ha, 100 acres = 40.47 ha. The quick mental rule is 'divide acres by 2.5'.
1 hectare equals 2.4711 acres, usually rounded to 2.47 acres. The mental shortcut '2.5 acres per hectare' is within 1% accurate.
1 acre is 43,560 square feet, or roughly the size of an American football field minus the end zones. In metric terms, 1 acre is 4047 m², about 64 m × 64 m if square.
1 hectare is exactly 10,000 m² — a square 100 m on each side, or about the area of an international rugby field plus its in-goal areas. Roughly 2.5 acres.
US land records, deeds, and survey systems standardized on acres before metric measures were available. Property registries, real-estate listings, and agricultural statistics carry the legacy. There is no active push to migrate.
Historically, an acre was the area a single farmer could plough in one day with a team of oxen — a strip 1 furlong (660 ft) by 1 chain (66 ft). Modern definitions standardize the figure but the geometry persists in older land surveys.
Hectare is technically a non-SI unit accepted for use with SI. The strict SI unit of area is the square metre. Hectare survives as a convenient size for land measurement, similar to how litre persists alongside cubic metre.
Property deeds and legal land transactions require survey-grade precision (cm-level boundaries). Casual conversion using 0.4047 is sufficient for shopping, comparing listings, and general planning, but the legal record always uses the surveyor's measured figures.