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Conversion Formula:
Convert Square Kilometer to Arpent (km² to arpent) 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 kilometer (km²) - large SI unit of area
Square kilometer is an SI unit of area equal to the area of a square with sides of 1 kilometer. Used for city sizes, land cover, and geographic mapping.
- Symbol: km²
- System: SI derived unit
- Exact relations: 1 km² = (1000 m)² = 1,000,000 m² = 100 ha = 10⁸ dm² = 10¹⁰ cm² = 10¹² mm²
- Imperial/US equivalents: 1 km² ≈ 0.386102159 mi² ≈ 247.105381 acres
- Typical examples: municipality areas, national park extents, watershed and habitat mapping
Arpent (arpent carré) - historical French/Canadian land area
Arpent is a traditional land-area unit from French measure, with region-dependent definitions; in Québec and Louisiana it commonly refers to the “square arpent.” Used historically in cadastral records, land grants, and property descriptions, and still encountered in legal and surveying contexts.
- Names/aliases: arpent, arpent carré (square arpent); related linear unit: arpent (length)
- System: Historical French/Canadian (and Louisiana) customary, non-SI
- Québec (modern metric): 1 arpent (length) ≈ 58.47 m; 1 square arpent ≈ 3,418.9 m² ≈ 0.34189 ha ≈ 0.845 acres
- Louisiana usage: “superficial arpent” for area; commonly treated ≈ 0.846 acres (≈ 3,424 m²), varies by historical source
- Notes: Values differed by locale and era (Paris vs. provincial measures). Always verify the jurisdiction’s legal definition for archival deeds and surveys.
- Typical examples: long-lot riverfront concessions described in arpents (e.g., frontage in linear arpents; parcel area in square arpents)