Convert square to square kilometer

Here you can quickly calculate how many square kilometer fit in one square.

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Example: square to square kilometer

Starting value Increment Accuracy

To convert square to square kilometer, multiply by 0.000009.

1 square = 0.000009 km²

Example: 1 square = 0.000009 square kilometer

A hectare is 10,000 m², a 100 × 100 m square, and one square kilometer holds 100 hectares. News stories about wildfires and land plots often mix the two up. Rule of thumb: a football pitch is roughly 0.7 hectares.
For areas the length factor must be squared, using it directly is the classic trap. 1 km is 1,000 m, but 1 km² is 1,000,000 m², and 1 m² is 10,000 cm². The rule: convert the length unit, then square the factor.

Score: 0

10 square kilometer equals 1.08e+6 square.

Correct answer: 10 square kilometer = 1.08e+6 square.

1 square kilometer equals 5.38e+5 square.

Correct answer: 1 square kilometer = 1.08e+5 square.

25 square equals 4.65e-5 square kilometer.

Correct answer: 25 square = 0.000232 square kilometer.

2 square kilometer equals 2.15e+4 square.

Correct answer: 2 square kilometer = 2.15e+5 square.

25 square equals 0.000232 square kilometer.

Correct answer: 25 square = 0.000232 square kilometer.