If you want to convert 21 hm² to km² or to calculate how much 21 hectares is in square kilometers you can use our free hectares to square kilometers converter:
21 hectares = 0.21 square kilometers
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Convert hectares to square kilometers | Convert square kilometers to hectares | Convert 21 square kilometers to hectares
How to convert 21 hectares to square kilometers
To convert 21 hm² to square kilometers you have to multiply 21 x 0.01, since 1 hm² is 0.01 km²So, if you want to calculate how many square kilometers are 21 hectares you can use this simple rule.
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21 hectares
Discover how much 21 hectares are in other area units :
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