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Conversion Formula:
Convert Are to Square Kilometer (a to km²) 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.
Are (a) - metric area unit
Are is a metric unit of area equal to 100 square meters. Used for measuring small land parcels, gardens, and property listings; closely related to the hectare (100 ares).
- Symbol: a
- System: Metric (non-SI, accepted for use with SI)
- Exact relations: 1 a = 100 m²; 1 ha = 100 a; 1 km² = 10,000 a
- Imperial/US equivalents: 1 a ≈ 1076.39104 ft² ≈ 119.599005 yd² ≈ 0.0247105381 acres
- Typical examples: garden plots ~1–5 a; small property subdivisions; cadastral records in parts of Europe
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