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Conversion Formula:
Convert Perch to Acre (perch to ac) 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.
Perch (square perch, square rod, pole, lug) - traditional land area
Perch is a historical Imperial/US customary unit of area equal to one square rod. Used in older cadastral records and property descriptions alongside roods and acres.
- Symbol: none standardized (written as “perch”, “sq perch”, or “square rod”)
- System: Imperial/US customary (historic)
- Exact relations: 1 perch = 1 square rod = (16.5 ft)² = 272.25 ft² = (5.0292 m)² = 25.29285264 m²
- Other relations: 40 perches = 1 rood; 160 perches = 1 acre; 16 perches = 1 square chai
- Typical examples: plot descriptions such as “2 roods 13 perches”; 19th-century deeds and survey plans
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