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 OEC = 50 gon
1 gon = 0.02 OEC
例子:
将15 一个八个圈转换为Gradian：
15 OEC = 750 gon
| 一个八个圈 | Gradian |
|---|---|
| 0.01 OEC | 0.5 gon |
| 0.1 OEC | 5 gon |
| 1 OEC | 50 gon |
| 2 OEC | 100 gon |
| 3 OEC | 150 gon |
| 5 OEC | 250 gon |
| 10 OEC | 500 gon |
| 20 OEC | 1,000 gon |
| 30 OEC | 1,500 gon |
| 40 OEC | 2,000 gon |
| 50 OEC | 2,500 gon |
| 60 OEC | 3,000 gon |
| 70 OEC | 3,500 gon |
| 80 OEC | 4,000 gon |
| 90 OEC | 4,500 gon |
| 100 OEC | 5,000 gon |
| 250 OEC | 12,500 gon |
| 500 OEC | 25,000 gon |
| 750 OEC | 37,500 gon |
| 1000 OEC | 50,000 gon |
| 10000 OEC | 500,000 gon |
| 100000 OEC | 5,000,000 gon |
规则