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Conversion Formula:
Convert Square Inch to Square Rod (in² to rod²) 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.
Square inch (in²) - Imperial/US area unit
Square inch is an Imperial/US customary unit of area equal to a square 1 inch on a side. Used for small surface areas in manufacturing, displays, and hardware specs.
- Symbol: in²
- System: Imperial/US customary
- Exact relations: 1 in² = (2.54 cm)² = 6.4516 cm² = 0.00064516 m² = 645.16 mm²
- Other relations: 1 in² = 1/144 ft² ≈ 0.006944444 ft² ≈ 0.000771605 yd²
- Typical examples: screen area, gasket/washer footprints, cross-sectional areas in inch–pound drawings
Square rod (sq rd; also perch, pole, lug) - traditional land area
Square rod is a historical Imperial/US customary unit of area equal to a square one rod on a side. Used in older land records and surveying alongside roods and acres.
- Symbols: sq rd, rd²; also “square perch”
- System: Imperial/US customary (historic)
- Exact relations: 1 sq rd = (16.5 ft)² = 272.25 ft² = (5.5 yd)² = 30.25 yd² = (5.0292 m)² = 25.29285264 m² (exact)
- Other relations: 40 sq rd = 1 rood; 160 sq rd = 1 acre; 16 sq rd = 1 square chain
- Typical examples: deed descriptions such as “2 roods 13 perches”; 19th-century cadastral plans