Radian (rad)
The SI angle unit: the angle subtending an arc equal to the radius.
Result
1 radian = 57.29577951 degrees
Radian at a glance
| Unit name | Radian (plural: radians) |
|---|---|
| Symbol | rad |
| Quantity measured | Angle |
| Measurement system | SI |
| Also known as | rad, radians |
| Definition exact? | Yes — exact by definition |
1 radian in other angle units
Popular radian conversions
Frequently asked questions
- What is a radian?
- The SI angle unit: the angle subtending an arc equal to the radius.
- What is the symbol for the radian?
- The symbol for the radian is rad. It measures angle.
- How many degrees are in a radian?
- 1 radian = 57.2957795 degrees.