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Area
Square feet to Square kilometers
Convert square feet (ft²) to square kilometers (km²). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 ft² = 9.2903e-8 km²
Square feet to Square kilometers Conversion Table
Common values, ready to copy:
| square feet | square kilometers |
|---|---|
| 1 ft² | 9.2903e-8 km² |
| 2 ft² | 1.8581e-7 km² |
| 5 ft² | 4.6452e-7 km² |
| 10 ft² | 9.2903e-7 km² |
| 25 ft² | 2.3226e-6 km² |
| 50 ft² | 4.6451e-6 km² |
| 100 ft² | 9.2903e-6 km² |
| 1,000 ft² | 9.2903e-5 km² |
Formula
square kilometers = square feet × 9.2903e-8
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
About Square feet and Square kilometers
Square feet (ft²): One foot squared, or 0.092903 m²; the dominant area unit in US real estate. Common uses: Home and apartment sizing in the United States, commercial real estate, lawn areas, and US construction blueprints.
Square kilometers (km²): One kilometer squared, or one million square meters. Common uses: City area, national park sizes, agricultural land, and geographic features at the regional scale.
How the conversion works
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
The exact relationship is square kilometers = square feet × 9.2903e-8, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between square feet and square kilometers comes up wherever area measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.