km² to m² Converter

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Convert square kilometers to square meters using the squared SI relation: 1 km² = 1,000,000 m². Anchors: 0.5 km² = 500,000 m² (50 ha), 1 km² = 1,000,000 m² (100 ha), 2.5 km² = 2,500,000 m² (250 ha). Useful for breaking down map-level km² into plot-level m² for development planning. Browser-local.

Square kilometer (km²)
Square meter (m²)

Square kilometer (km²) → Square meter (m²)

Quick reference table

Square kilometer (km²)Square meter (m²)
1 km²1000000 m²
2 km²2000000 m²
5 km²5000000 m²
10 km²10000000 m²
25 km²25000000 m²
50 km²50000000 m²
100 km²100000000 m²

Glossary

Square kilometer (km²)

A square kilometer equals 1,000,000 m² or 100 hectares. It is the standard unit for city, region and country areas on metric maps. 1 km² ≈ 0.3861 mi² ≈ 247.1 acres. Note: 1 km² = 1,000,000 m² (not 1,000), because area scales as the square of length. The city of Paris covers about 105 km².

Square meter (m²)

The square meter is the SI derived unit of area, equal to the area of a square one meter on each side. It is the standard unit for room sizes, real-estate floor area in metric countries, fabric and material widths × heights, and most engineering surface areas. 1 m² = 10,000 cm² = 10.7639 ft².

Metric / SI area

In the metric system, area is reported in square meters (SI base) and its scaled units — square millimeter, square centimeter, square kilometer — plus the convenient hectare (10,000 m²) for land. Each step is exactly 100× the previous because area scales as the square of length: 1 m² = 100 dm² = 10,000 cm² = 1,000,000 mm². This squared scaling is the most common manual-conversion error.

Imperial / US Customary area

US customary and UK imperial systems use square inch, square foot, square yard, acre and square mile (144 in² = 1 ft², 9 ft² = 1 yd², 4,840 yd² = 1 acre, 640 acres = 1 mi²). The acre — historically the area a team of oxen could plow in a day — survives as the standard land-parcel unit in the US. Linked to metric by 1 ft² = 0.09290304 m² exactly.

Related tools

Square Meters to Square Kilometers
Convert m² to km² — 1,000,000 m² = 1 km² (not 1,000!)
Square Kilometers to Square Miles
Convert km² to mi² — 1 km² ≈ 0.3861 mi²
Square Meters to Hectares
Convert m² to hectares — 10,000 m² = 1 ha
Area Converter
Convert area — mm², cm², m², ha, km², in², ft², yd², acres, mi²