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 = 14.324 crad
1 crad = 0.07 qtr
例子:
将15 象限转换为圆形弧度：
15 qtr = 214.859 crad
| 象限 | 圆形弧度 |
|---|---|
| 0.01 qtr | 0.143 crad |
| 0.1 qtr | 1.432 crad |
| 1 qtr | 14.324 crad |
| 2 qtr | 28.648 crad |
| 3 qtr | 42.972 crad |
| 5 qtr | 71.62 crad |
| 10 qtr | 143.239 crad |
| 20 qtr | 286.479 crad |
| 30 qtr | 429.718 crad |
| 40 qtr | 572.957 crad |
| 50 qtr | 716.197 crad |
| 60 qtr | 859.436 crad |
| 70 qtr | 1,002.675 crad |
| 80 qtr | 1,145.915 crad |
| 90 qtr | 1,289.154 crad |
| 100 qtr | 1,432.393 crad |
| 250 qtr | 3,580.984 crad |
| 500 qtr | 7,161.967 crad |
| 750 qtr | 10,742.951 crad |
| 1000 qtr | 14,323.934 crad |
| 10000 qtr | 143,239.342 crad |
| 100000 qtr | 1,432,393.418 crad |
规则