Angle Converter
Runs locally in your browser. Nothing leaves your device.Instantly convert angles between degrees, radians, gradians, arcminutes, arcseconds, turns, milliradians, and NATO mils.
Use a comma or period as the decimal separator; do not use thousands separators.
All units
Radian
Degrees and arc units
Gon
Turn
Navigation and computer
How it works
- 1
Enter value and source unit
Enter the angle value as a decimal number and choose the source unit.
- 2
Choose the target unit
Choose the target unit, even from a different group, for example from degrees to NATO mil.
- 3
Copy the result or swap units
Copy one or all results, or swap the source and target unit for the next conversion.
Good to know
The angle converter converts directly in your browser between degree and arc units, radians, gradians, and navigation/computer units such as NATO mil. A full turn equals 360° = 2π rad = 400 gradians; NATO mil here means exactly 6400 units per full turn and is not the same as milliradian.
Calculation runs locally in the browser. Expressions such as “π/2” are not parsed as a formula — enter radian values as a decimal number. Angles can be negative or span multiple turns; the tool does not automatically normalize values to 0°–360°.
Typical use cases
Convert degrees and radians for formulas
Convert degrees to radians or vice versa when a mathematical formula or programming library expects a specific unit.
Correctly interpret navigation and military units
Convert NATO mil to degrees, keeping in mind it's exactly 6400 units per full turn, not milliradian.
Convert surveying values in gradians
Convert gradian values from surveying or geodesy into degrees or radians, for example to compare with other technical figures.
Tips for better results
Calculate π expressions beforehand
The tool doesn't parse expressions like “π/2” — calculate the decimal value beforehand and enter it directly.
Normalize the value yourself if needed
Since negative angles or values above 360° are not normalized automatically, check yourself if needed whether a value falls within the expected 0°–360° range.
Features
Four unit groups
Degree & arc units, radian, gradian, and navigation & computer are cleanly separated.
Local conversion
Calculation happens directly in the browser, without transmission to a server.
Clear definitions without normalization
Exact definitions such as NATO mil are shown; angles remain unchanged, even negative or above 360°.
Frequently asked questions
Is NATO mil the same as milliradian?
No. NATO mil here means exactly 6400 units per full turn and differs from the definition of milliradian.
Can I enter π expressions like “π/2”?
No. Such expressions are not parsed — calculate the decimal value beforehand and enter it directly.
Are my inputs uploaded?
No. Conversion runs entirely locally in the browser.
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