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 FC = 4 QC
1 QC = 0.25 FC
例子:
将15 完整的圆圈转换为四分之一圈：
15 FC = 60 QC
| 完整的圆圈 | 四分之一圈 |
|---|---|
| 0.01 FC | 0.04 QC |
| 0.1 FC | 0.4 QC |
| 1 FC | 4 QC |
| 2 FC | 8 QC |
| 3 FC | 12 QC |
| 5 FC | 20 QC |
| 10 FC | 40 QC |
| 20 FC | 80 QC |
| 30 FC | 120 QC |
| 40 FC | 160 QC |
| 50 FC | 200 QC |
| 60 FC | 240 QC |
| 70 FC | 280 QC |
| 80 FC | 320 QC |
| 90 FC | 360 QC |
| 100 FC | 400 QC |
| 250 FC | 1,000 QC |
| 500 FC | 2,000 QC |
| 750 FC | 3,000 QC |
| 1000 FC | 4,000 QC |
| 10000 FC | 40,000 QC |
| 100000 FC | 400,000 QC |
规则