Convert Acre to Square Mile

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Conversion Formula:

mi² = ac × 0.001562

Convert Acre to Square Mile (ac to mi²) instantly with accurate, readable results.

Convert between square meters, acres, square feet, hectares, and other common units with our Area Unit Converter. This intuitive unit conversion tool helps you calculate land size, floor space, and surface area across both metric and imperial systems. Whether you're working on real estate, construction, or geography tasks, our area unit conversion calculator ensures precise and instant results.

From unit

Acre (ac) - Imperial/US land area

Acre is a traditional unit of area used for land measurement in the UK, US, and other countries. Used in real estate, agriculture, and land records; metrically it converts exactly because the foot is defined in meters.

  • Symbol: ac
  • System: Imperial/US customary (non-SI, accepted for use with SI
  • Exact relations: 1 acre = 43,560 ft² = 4,840 yd² = 160 square rods (perches/poles) = 10 square chains
  • Metric equivalents (exact): 1 acre = 4046.8564224 m² ≈ 0.40468564224 ha
  • Typical examples: suburban lots (fractions of an acre); farm fields of tens to hundreds of acres; sports complexes measured in multiple acres
To unit

Square mile (mi²) - large land area

Square mile is an Imperial/US customary unit of area equal to a square 1 mile on a side. Used for cities, counties, and large land tracts.

  • Symbol: mi²
  • System: Imperial/US customary
  • Exact relations: 1 mi² = (5280 ft)² = 27,878,400 ft² = 3,097,600 yd² = 640 acres
  • Metric equivalents: 1 mi² = (1609.344 m)² = 2,589,988.110336 m² ≈ 2.58999 km²
  • Typical examples: municipal areas, county sizes, watershed extents