Angle is a measure of rotation between two intersecting lines or surfaces. It is measured in degrees (°) or radians (rad).
1 TEC = 3 OEC 
1 OEC = 0.333 TEC 
उदाहरण: 
कन्वर्ट 15 Three Eighth Circle से One Eighth Circle:
15 TEC = 45 OEC 
| Three Eighth Circle | One Eighth Circle | 
|---|---|
| 0.01 TEC | 0.03 OEC | 
| 0.1 TEC | 0.3 OEC | 
| 1 TEC | 3 OEC | 
| 2 TEC | 6 OEC | 
| 3 TEC | 9 OEC | 
| 5 TEC | 15 OEC | 
| 10 TEC | 30 OEC | 
| 20 TEC | 60 OEC | 
| 30 TEC | 90 OEC | 
| 40 TEC | 120 OEC | 
| 50 TEC | 150 OEC | 
| 60 TEC | 180 OEC | 
| 70 TEC | 210 OEC | 
| 80 TEC | 240 OEC | 
| 90 TEC | 270 OEC | 
| 100 TEC | 300 OEC | 
| 250 TEC | 750 OEC | 
| 500 TEC | 1,500 OEC | 
| 750 TEC | 2,250 OEC | 
| 1000 TEC | 3,000 OEC | 
| 10000 TEC | 30,000 OEC | 
| 100000 TEC | 300,000 OEC |