Angle Converter
Convert degrees, radians, gradians and more.
How to use
- 1 Enter the angle value you want to convert.
- 2 Choose the unit you are converting from.
- 3 Read the equivalent value in every supported unit.
- 4 Copy a single result or all conversions at once.
About Angle Converter
The Angle Converter translates a single angle into every common unit at once, so you never have to remember a conversion factor or reach for a calculator mid-task.
Type a value, pick the unit you are starting from, and the tool instantly shows the equivalent in degrees, radians, gradians (gons), full turns, arcminutes, arcseconds and NATO mils.
Each unit suits a different field.
Degrees are the everyday choice for geometry and navigation; radians are the natural unit for trigonometry, calculus and almost every programming language’s math library; gradians divide the right angle into a tidy 100 parts for surveying; turns express whole revolutions; arcminutes and arcseconds subdivide a degree for astronomy and precise bearings; and mils are used in artillery and optics.
Seeing them side by side makes it easy to sanity-check a formula or move a value between domains.
Negative angles are fully supported, and a handy extra shows the value normalised into a single 0–360° turn, which collapses multiple revolutions back into one.
Results are rounded to remove floating-point noise, and a copy button grabs the full set of conversions for pasting into code, a spreadsheet or notes.
Everything is computed locally in your browser — nothing is uploaded — and the figures update live as you type.
FAQ
How many radians are in 180 degrees?
Exactly π radians (about 3.14159). The converter shows this and the equivalents in gradians, turns, arcminutes, arcseconds and mils at the same time.
What is a gradian?
A gradian (or gon) divides a right angle into 100 parts, so a full turn is 400 gradians. It is common in surveying because it keeps right-angle arithmetic simple.
Can I convert negative angles?
Yes. Negative values such as −90° convert correctly, and the tool also shows the angle normalised into the 0–360° range for convenience.