About this Angle Converter
Angle Converter provides common angular unit conversions used in mathematics, engineering and programming.
Formula or method
All angles are normalized to radians using 360° = 2π radians = 400 gradians = 1 turn.
Example
180° = π radians = 200 gradians = 0.5 turn.
Common uses
- Convert degrees to radians.
- Translate gradians to degrees.
- Express rotations as turns.
How to use this tool
- Enter the values or text requested by the calculator.
- Choose units or options when the tool provides them.
- Select the calculation button and review the result.
- Use the formula, example and notes on this page to check whether the result fits your situation.
Important note
Displayed decimals are rounded, so values involving π may not show every digit.
Frequently asked questions
How many radians are in a full turn?
A full turn is 2π radians.
Can angles be negative?
Yes. Negative angles are converted using the same proportional relationships.