Conversion factors and the formula for converting between angle units. For the reasoning behind these numbers, see Angle Units Explained.
| Degrees | Radians | Gradians |
|---|---|---|
| 90° | π/2 ≈ 1.5708 | 100 grad |
| 180° | π ≈ 3.1416 | 200 grad |
| 270° | 3π/2 ≈ 4.7124 | 300 grad |
| 360° (1 turn) | 2π ≈ 6.2832 | 400 grad |
The Angle Converter converts between degrees, radians, gradians, and turns instantly.
Angle Converter
It traces back to the ancient Babylonian base-60 number system and roughly matches the number of days in a year, and the convention stuck.
The angle formed when the arc length along a circle equals its radius. One radian is about 57.296 degrees.
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