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Convert square kilometres to square feet

1 km² = 10763900 ft²

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Questions

How many square feet are in a square kilometre?

One square kilometre is 10763910.4 square feet. To convert any amount, multiply by 10763910.4. Going the other way, one square foot is 9.290304e-8 square kilometres.

What is the formula to convert km² to ft²?

Multiply the square kilometre figure by 10763910.4. So ft² = km² × 10763910.4. For a quick mental estimate, multiplying by about 10763910 gets you within a percent or so, which is close enough for most everyday purposes.

What does a square kilometre actually look like?

One square kilometre is a medium city park. The square kilometre is the standard unit for reporting the area of cities, parks and countries in the metric world.

And what is a square foot?

One square foot is about the size of a floor tile. The square foot is exactly 0.09290304 square metres. It remains the property unit in the US, Canada, the UK and much of South Asia.

Is this conversion exact?

Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding km² before converting introduces an error the conversion then multiplies.

About km² to ft²

How to convert square kilometres to square feet

Multiply by 10763910.4. One square kilometre is 10763910.4 square feet, and one square foot is 9.290304e-8 square kilometres.

ft² = km² × 10763910.4

Worked example

100 km² = 1076391000 ft². For a sense of scale, one square kilometre is a medium city park, and one square foot is about the size of a floor tile.

About the square kilometre

The square kilometre is the standard unit for reporting the area of cities, parks and countries in the metric world.

About the square foot

The square foot is exactly 0.09290304 square metres. It remains the property unit in the US, Canada, the UK and much of South Asia.

Quick reference

square kilometressquare feet
1 km²10763900 ft²
2 km²21527800 ft²
5 km²53819600 ft²
10 km²107639000 ft²
25 km²269098000 ft²
50 km²538196000 ft²
100 km²1076390000 ft²
1000 km²10763900000 ft²

Getting it right

This conversion is exact by definition, so the only limit on accuracy is how many digits you keep. Round at the end rather than partway through — rounding km² to a whole number before converting introduces an error that the conversion then multiplies.

Other area conversions

Convert square feet back to square kilometres, or pick any other pair with the full unit converter. Related: km² to , km² to acre, km² to ha.