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 = 0.75 TC
1 TC = 1.333 QC
例子:
将15 四分之一圈转换为第三圈：
15 QC = 11.25 TC
| 四分之一圈 | 第三圈 |
|---|---|
| 0.01 QC | 0.008 TC |
| 0.1 QC | 0.075 TC |
| 1 QC | 0.75 TC |
| 2 QC | 1.5 TC |
| 3 QC | 2.25 TC |
| 5 QC | 3.75 TC |
| 10 QC | 7.5 TC |
| 20 QC | 15 TC |
| 30 QC | 22.5 TC |
| 40 QC | 30 TC |
| 50 QC | 37.5 TC |
| 60 QC | 45 TC |
| 70 QC | 52.5 TC |
| 80 QC | 60 TC |
| 90 QC | 67.5 TC |
| 100 QC | 75 TC |
| 250 QC | 187.5 TC |
| 500 QC | 375 TC |
| 750 QC | 562.5 TC |
| 1000 QC | 750 TC |
| 10000 QC | 7,500 TC |
| 100000 QC | 75,000 TC |
规则