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