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 gon = 0.005 HC
1 HC = 200 gon
例子:
将15 Gradian转换为半圈：
15 gon = 0.075 HC
| Gradian | 半圈 |
|---|---|
| 0.01 gon | 5.0000e-5 HC |
| 0.1 gon | 0.001 HC |
| 1 gon | 0.005 HC |
| 2 gon | 0.01 HC |
| 3 gon | 0.015 HC |
| 5 gon | 0.025 HC |
| 10 gon | 0.05 HC |
| 20 gon | 0.1 HC |
| 30 gon | 0.15 HC |
| 40 gon | 0.2 HC |
| 50 gon | 0.25 HC |
| 60 gon | 0.3 HC |
| 70 gon | 0.35 HC |
| 80 gon | 0.4 HC |
| 90 gon | 0.45 HC |
| 100 gon | 0.5 HC |
| 250 gon | 1.25 HC |
| 500 gon | 2.5 HC |
| 750 gon | 3.75 HC |
| 1000 gon | 5 HC |
| 10000 gon | 50 HC |
| 100000 gon | 500 HC |
规则