Angle Converter — Angles are measured in degrees (°), radians (rad), or gradians (gon) depending on the field. Math and physics use radians. Navigation, surveying, and astronomy use degrees (often subdivided into arcminutes and arcseconds). Civil engineering in some countries uses gradians.
Conversions run locally in your browser. No values are sent anywhere.
Was Angle Converter useful?
What is angle converter?
Angles are measured in degrees (°), radians (rad), or gradians (gon) depending on the field. Math and physics use radians. Navigation, surveying, and astronomy use degrees (often subdivided into arcminutes and arcseconds). Civil engineering in some countries uses gradians.
One full turn is 360° = 2π rad = 400 gon. This converter uses the radian as the base.
How to use it
-
Enter a value
Type the angle in any supported unit. The default is 1 degree.
-
Pick the units
The from/to dropdowns include degrees, radians, gradians, arcminutes, arcseconds, and turns.
-
Watch the result
The result updates live as you type. The quick-reference table shows 1, 10, 100, 1000, 10000 in the source unit.
Examples
180° in radians
A straight angle is π radians.
180°
Result: ≈ 3.14159 rad
Frequently asked questions
Related tools
Unit Converter
Convert length, weight, temperature, area, volume, speed, time, and data units instantly.
Percentage Calculator
Three percentage tools in one: percent of a value, ratio as a percent, and percent change.
Binary, Hex & Octal Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Type in any field and the other three update live.
Energy Converter
Convert between joule, kilojoule, calorie, kilocalorie, watt-hour, kilowatt-hour, BTU, electron-volt, and more.
Last reviewed: 2026-08-21