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 qtr = 1 QC
1 QC = 1 qtr
例子:
将15 象限转换为四分之一圈：
15 qtr = 15 QC
| 象限 | 四分之一圈 |
|---|---|
| 0.01 qtr | 0.01 QC |
| 0.1 qtr | 0.1 QC |
| 1 qtr | 1 QC |
| 2 qtr | 2 QC |
| 3 qtr | 3 QC |
| 5 qtr | 5 QC |
| 10 qtr | 10 QC |
| 20 qtr | 20 QC |
| 30 qtr | 30 QC |
| 40 qtr | 40 QC |
| 50 qtr | 50 QC |
| 60 qtr | 60 QC |
| 70 qtr | 70 QC |
| 80 qtr | 80 QC |
| 90 qtr | 90 QC |
| 100 qtr | 100 QC |
| 250 qtr | 250 QC |
| 500 qtr | 500 QC |
| 750 qtr | 750 QC |
| 1000 qtr | 1,000 QC |
| 10000 qtr | 10,000 QC |
| 100000 qtr | 100,000 QC |
规则