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 HC = 2 QC
1 QC = 0.5 HC
例子:
将15 半圈转换为四分之一圈：
15 HC = 30 QC
| 半圈 | 四分之一圈 |
|---|---|
| 0.01 HC | 0.02 QC |
| 0.1 HC | 0.2 QC |
| 1 HC | 2 QC |
| 2 HC | 4 QC |
| 3 HC | 6 QC |
| 5 HC | 10 QC |
| 10 HC | 20 QC |
| 20 HC | 40 QC |
| 30 HC | 60 QC |
| 40 HC | 80 QC |
| 50 HC | 100 QC |
| 60 HC | 120 QC |
| 70 HC | 140 QC |
| 80 HC | 160 QC |
| 90 HC | 180 QC |
| 100 HC | 200 QC |
| 250 HC | 500 QC |
| 500 HC | 1,000 QC |
| 750 HC | 1,500 QC |
| 1000 HC | 2,000 QC |
| 10000 HC | 20,000 QC |
| 100000 HC | 200,000 QC |
规则