Convert Acre to Rood

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Conversion Formula:

ro = ac × 4.000004

Convert Acre to Rood (ac to ro) 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

Rood (rood) - traditional land area

Rood is a historical Imperial/US customary unit of area equal to one quarter of an acre. Used in older land records, field measurements, and some property descriptions.

  • Symbol: none standardized (written as “rood”)
  • System: Imperial/US customary (historic)
  • Exact relations: 1 rood = 1/4 acre = 40 square rods (perches) = 2.5 square chains
  • Other relations: 1 rood = 1 furlong × 1 rod = 10,890 ft² = 1,210 yd²
  • Metric equivalents (exact): 1 rood = 1011.7141056 m²
  • Typical examples: historical parcel sizes in deeds; subdivision remnants expressed as roods and perches