Acres to Hectares Converter

Multiply acres by 0.40468564224 to get hectares.

1 ac = 0.4046856422 ha

Convert hectares to acres instead

Formula

1 ac = 0.4046856422 ha

hectares = acres × 0.4046856422

Worked example

Convert 40 acres to hectares

  1. Multiply by 0.4046856422
  2. 40 × 0.4046856422 = 16.1874

40 ac = 16.1874 ha

Good to know

An acre is about 40% of a hectare, or roughly 63.6 m × 63.6 m if it were square. The historical US “quarter-quarter section” of 40 acres is 16.19 ha. An American football field including end zones is about 1.32 acres (0.535 ha).

Conversion table

Acres to hectares conversion table
Acres (ac)Hectares (ha)
0.250.101171
0.50.202343
10.404686
20.809371
52.02343
104.04686
208.09371
4016.1874
8032.3749
10040.4686
16064.7497
640258.999

About these units

Acre (ac)
Exactly 43,560 square feet (4,046.8564224 m²). Traditionally a strip one furlong by one chain.
Hectare (ha)
Exactly 10,000 m² — a square 100 m on each side. Used for farmland and parks.