Angle Converter
Convert angles between degrees, radians, gradians, and turns, useful for math, design, and graphics programming.
1.570796
Frequently asked questions
Why do programming languages use radians instead of degrees?+
Radians are the mathematically natural unit for angles (a full circle is exactly 2π radians), which makes calculus and trigonometric formulas simpler. Nearly every programming language's math library (Math.sin, Math.cos, and so on) expects radians, not degrees, which is a common source of subtly wrong output when someone forgets to convert.
What's a gradian, and where is it actually used?+
A gradian divides a full circle into 400 units instead of 360, making a right angle exactly 100 gradians. It's mostly used in surveying and some European engineering contexts; most people will never need it outside of those fields.
What does "turns" mean as a unit?+
One turn equals one full 360-degree rotation. It shows up in some animation and design tools (CSS supports it directly, like rotate(0.5turn)) because "half a turn" is often more intuitive to write than "180deg."