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 = 0.125 FC
1 FC = 8 OEC
例子:
将15 一个八个圈转换为完整的圆圈：
15 OEC = 1.875 FC
| 一个八个圈 | 完整的圆圈 |
|---|---|
| 0.01 OEC | 0.001 FC |
| 0.1 OEC | 0.013 FC |
| 1 OEC | 0.125 FC |
| 2 OEC | 0.25 FC |
| 3 OEC | 0.375 FC |
| 5 OEC | 0.625 FC |
| 10 OEC | 1.25 FC |
| 20 OEC | 2.5 FC |
| 30 OEC | 3.75 FC |
| 40 OEC | 5 FC |
| 50 OEC | 6.25 FC |
| 60 OEC | 7.5 FC |
| 70 OEC | 8.75 FC |
| 80 OEC | 10 FC |
| 90 OEC | 11.25 FC |
| 100 OEC | 12.5 FC |
| 250 OEC | 31.25 FC |
| 500 OEC | 62.5 FC |
| 750 OEC | 93.75 FC |
| 1000 OEC | 125 FC |
| 10000 OEC | 1,250 FC |
| 100000 OEC | 12,500 FC |
规则