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 = 0.02 OEC
1 OEC = 50 gon
例子:
将15 Gradian转换为一个八个圈：
15 gon = 0.3 OEC
| Gradian | 一个八个圈 |
|---|---|
| 0.01 gon | 0 OEC |
| 0.1 gon | 0.002 OEC |
| 1 gon | 0.02 OEC |
| 2 gon | 0.04 OEC |
| 3 gon | 0.06 OEC |
| 5 gon | 0.1 OEC |
| 10 gon | 0.2 OEC |
| 20 gon | 0.4 OEC |
| 30 gon | 0.6 OEC |
| 40 gon | 0.8 OEC |
| 50 gon | 1 OEC |
| 60 gon | 1.2 OEC |
| 70 gon | 1.4 OEC |
| 80 gon | 1.6 OEC |
| 90 gon | 1.8 OEC |
| 100 gon | 2 OEC |
| 250 gon | 5 OEC |
| 500 gon | 10 OEC |
| 750 gon | 15 OEC |
| 1000 gon | 20 OEC |
| 10000 gon | 200 OEC |
| 100000 gon | 2,000 OEC |
规则