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Square Foot to Square Kilometer Conversion Calculator: Free Online Tool

Convert square feet to square kilometers with our free online area converter.

Square Foot to Square Kilometer Calculator

Square Foot
Square Kilometer

How to Use the Calculator:

  1. Enter the value you want to convert in the 'From' field (Square Foot).
  2. The converted value in Square Kilometer will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Area category.
  4. Click the swap button (⇌) to reverse the conversion direction.

How to Convert Square Foot to Square Kilometer

Converting Square Foot to Square Kilometer involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Square Foot = 9.2903e-8 square kilometers

Example Calculation:

Convert 10 square feet: 10 × 9.2903e-8 = 9.2903e-7 square kilometers

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

What is a Square Foot and a Square Kilometer?

The square foot (symbol: ft², sq ft) is an imperial and US customary unit of area. It represents the area of a square with sides that are each one foot long.

The square kilometer (symbol: km²) is a decimal multiple of the SI unit of area, the square meter. It represents the area of a square with sides that are each one kilometer long (1 km² = 1,000,000 m²).

Note: The Square Foot is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Square Kilometer belongs to the metric (SI) system.

History of the Square Foot and Square Kilometer

Derived from the foot, a unit of length with historical roots in various ancient civilizations, the square foot became a standard measure of area in systems using the foot, particularly in the British Empire and subsequently the United States. It remains widely used in these regions, especially in construction and real estate.

As a multiple of the square meter, the square kilometer came into use alongside the metric system for measuring large areas like land masses, cities, and countries. Its adoption followed the establishment of the kilometer as a standard unit of distance.

Common Uses for square feet and square kilometers

Explore the typical applications for both Square Foot (imperial/US) and Square Kilometer (metric) to understand their common contexts.

Common Uses for square feet

  • Real Estate & Construction (US/UK): The primary unit for measuring floor space in residential and commercial buildings, room sizes, and smaller land parcels in the US, UK, Canada, and some other countries.
  • Home Improvement: Used for calculating materials needed for flooring, tiling, painting walls, etc.
  • Gardening & Landscaping (US/UK): Estimating the area for small gardens, lawns, or patios.
  • Art & Photography: Sometimes used to specify the dimensions or area of artwork or prints.

Common Uses for square kilometers

  • Geography & Cartography: Standard unit for measuring the land area of cities, regions, countries, and continents.
  • Demographics: Used to calculate population density (people per km²).
  • Environmental Science: Measuring the extent of forests, deserts, lakes, or areas affected by environmental changes (e.g., deforestation, wildfires).
  • Urban Planning: Assessing land use and zoning areas within large municipalities.

Frequently Asked Questions

Questions About Square Foot (ft²)

How big is a square foot?

It's the area of a square measuring 1 foot by 1 foot (or 12 inches by 12 inches).

How many square inches are in a square foot?

There are 144 square inches in one square foot (12 inches x 12 inches).

How many square feet are in a square meter?

One square meter contains approximately 10.764 square feet. Conversely, one square foot is about 0.0929 square meters.

Where is the square foot mainly used?

It is primarily used in the United States, Canada, the United Kingdom, and several other countries influenced by the imperial system, mainly for construction and real estate.

About Square Kilometer (km²)

How many square meters are in a square kilometer?

There are 1,000,000 square meters in one square kilometer (1 km x 1 km = 1000 m x 1000 m).

How many square miles are in a square kilometer?

One square kilometer is approximately 0.3861 square miles.

Is km² used for small areas?

No, it's generally used for very large areas like cities or countries. Square meters, hectares, or acres are used for smaller plots.

Is km² an official SI unit?

While based on the SI unit meter, the official SI derived unit for area is the square meter (m²). However, the square kilometer is a standard metric unit widely accepted for use with SI.

Conversion Table: Square Foot to Square Kilometer

Square Foot (ft²)Square Kilometer (km²)
10
50
100
250
500
1000
5000
1,0000

All Area Conversions

Square Meter to Square KilometerSquare Meter to Square CentimeterSquare Meter to Square MillimeterSquare Meter to Square InchSquare Meter to Square FootSquare Meter to Square YardSquare Meter to Square MileSquare Meter to AcreSquare Meter to HectareSquare Kilometer to Square MeterSquare Kilometer to Square CentimeterSquare Kilometer to Square MillimeterSquare Kilometer to Square InchSquare Kilometer to Square FootSquare Kilometer to Square YardSquare Kilometer to Square MileSquare Kilometer to AcreSquare Kilometer to HectareSquare Centimeter to Square MeterSquare Centimeter to Square KilometerSquare Centimeter to Square MillimeterSquare Centimeter to Square InchSquare Centimeter to Square FootSquare Centimeter to Square YardSquare Centimeter to Square MileSquare Centimeter to AcreSquare Centimeter to HectareSquare Millimeter to Square MeterSquare Millimeter to Square KilometerSquare Millimeter to Square CentimeterSquare Millimeter to Square InchSquare Millimeter to Square FootSquare Millimeter to Square YardSquare Millimeter to Square MileSquare Millimeter to AcreSquare Millimeter to HectareSquare Inch to Square MeterSquare Inch to Square KilometerSquare Inch to Square CentimeterSquare Inch to Square MillimeterSquare Inch to Square FootSquare Inch to Square YardSquare Inch to Square MileSquare Inch to AcreSquare Inch to HectareSquare Foot to Square MeterSquare Foot to Square CentimeterSquare Foot to Square MillimeterSquare Foot to Square InchSquare Foot to Square YardSquare Foot to Square MileSquare Foot to AcreSquare Foot to HectareSquare Yard to Square MeterSquare Yard to Square KilometerSquare Yard to Square CentimeterSquare Yard to Square MillimeterSquare Yard to Square InchSquare Yard to Square FootSquare Yard to Square MileSquare Yard to AcreSquare Yard to HectareSquare Mile to Square MeterSquare Mile to Square KilometerSquare Mile to Square CentimeterSquare Mile to Square MillimeterSquare Mile to Square InchSquare Mile to Square FootSquare Mile to Square YardSquare Mile to AcreSquare Mile to HectareAcre to Square MeterAcre to Square KilometerAcre to Square CentimeterAcre to Square MillimeterAcre to Square InchAcre to Square FootAcre to Square YardAcre to Square MileAcre to HectareHectare to Square MeterHectare to Square KilometerHectare to Square CentimeterHectare to Square MillimeterHectare to Square InchHectare to Square FootHectare to Square YardHectare to Square MileHectare to Acre

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