角度是两个相交线或表面之间旋转的度量。它以程度（°）或弧度（rad）为单位进行测量。
1 mrad = 0 HC
1 HC = 3,141.592 mrad
例子:
将15 Milliradian转换为半圈：
15 mrad = 0.005 HC
| Milliradian | 半圈 |
|---|---|
| 0.01 mrad | 3.1831e-6 HC |
| 0.1 mrad | 3.1831e-5 HC |
| 1 mrad | 0 HC |
| 2 mrad | 0.001 HC |
| 3 mrad | 0.001 HC |
| 5 mrad | 0.002 HC |
| 10 mrad | 0.003 HC |
| 20 mrad | 0.006 HC |
| 30 mrad | 0.01 HC |
| 40 mrad | 0.013 HC |
| 50 mrad | 0.016 HC |
| 60 mrad | 0.019 HC |
| 70 mrad | 0.022 HC |
| 80 mrad | 0.025 HC |
| 90 mrad | 0.029 HC |
| 100 mrad | 0.032 HC |
| 250 mrad | 0.08 HC |
| 500 mrad | 0.159 HC |
| 750 mrad | 0.239 HC |
| 1000 mrad | 0.318 HC |
| 10000 mrad | 3.183 HC |
| 100000 mrad | 31.831 HC |
规则