Angle Converter — Degrees, Radians, Gradians
The Angle Converter converts between all major angle units used in mathematics, engineering, navigation, and surveying — degrees, radians, gradians (grads), turns, arc minutes, and arc seconds. Whether you are working on trigonometry, programming 3D rotations, or reading surveying data, this free tool handles every conversion instantly.
How to Use This Calculator
- 1
Enter the angle value you want to convert.
- 2
Select the unit you are converting from (e.g. Degree).
- 3
Select the target unit (e.g. Radian).
- 4
Click Convert to see the result.
Frequently Asked Questions
Multiply degrees by π/180 (approximately 0.017453). So 90° = 90 × π/180 = π/2 ≈ 1.5708 radians. To go from radians to degrees, multiply by 180/π ≈ 57.296.