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 = 0.5 QC
1 QC = 2 OEC
例子:
将15 一个八个圈转换为四分之一圈：
15 OEC = 7.5 QC
| 一个八个圈 | 四分之一圈 |
|---|---|
| 0.01 OEC | 0.005 QC |
| 0.1 OEC | 0.05 QC |
| 1 OEC | 0.5 QC |
| 2 OEC | 1 QC |
| 3 OEC | 1.5 QC |
| 5 OEC | 2.5 QC |
| 10 OEC | 5 QC |
| 20 OEC | 10 QC |
| 30 OEC | 15 QC |
| 40 OEC | 20 QC |
| 50 OEC | 25 QC |
| 60 OEC | 30 QC |
| 70 OEC | 35 QC |
| 80 OEC | 40 QC |
| 90 OEC | 45 QC |
| 100 OEC | 50 QC |
| 250 OEC | 125 QC |
| 500 OEC | 250 QC |
| 750 OEC | 375 QC |
| 1000 OEC | 500 QC |
| 10000 OEC | 5,000 QC |
| 100000 OEC | 50,000 QC |
规则