平方公里(或稱平方千米,符號爲km²)是面積个公制單位(SI Unit),其定義是「邊長爲1公里个正方形个面積」。
1平方公里(1km²)等於: | |
| (1平方米=0.000001平方公里) |
| (1平方厘米=0.0000000001平方公里) |
| (1公頃=0.01平方公里) |
| (1公畝=0.0001平方公里) |
| (1畝=0.000666667平方公里) |
| (1英畝=0.004047平方公里) |
| (日本面积单位,1町=0.009917平方公里) |
| (1平方英里=2.589988平方公里) |
| (1平方英尺=0.000000092951平方公里) |
| (1平方英寸=0.000000000645平方公里) |
| |
| (泰国面积单位,1莱=1600平方米) |
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