Angle Converter
Convert any angle between degrees, radians, gradians, and turns instantly.
How it works
- 1Enter any angle value and choose its source unit (degrees, radians, gradians, or turns).
- 2The tool converts to all four units at once using 360° = 2π rad = 400 grad = 1 turn.
- 3Results update live as you type — no button press required.
Use cases
- Converting radian outputs from programming functions into human-readable degrees.
- Working with surveying or artillery calculations that use gradians (gon).
- Translating animation or rotation values expressed in turns to degrees for CSS or SVG.
Frequently asked questions
What is a gradian?
A gradian (grad) divides a full circle into 400 equal parts, so a right angle is exactly 100 grad. Gradians are common in surveying and civil engineering for decimal right-angle arithmetic.
What does turns mean?
One turn is one full revolution — 360°, 2π radians, or 400 gradians. Turns appear in CSS (the turn unit), physics, and game engines.
Why are there 2π radians in a full circle?
A radian is the angle subtended by an arc equal in length to the radius. A circle’s circumference is 2πr, so a full rotation sweeps exactly 2π radii — hence 2π radians.
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