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Conversion Formula:
Convert Perch to Square Mile (perch 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.
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
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