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Angle Converter
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// about this tool

Angle Converter Online

Updated 2026-07-09

Convert angles online for free between degrees, radians, gradians, arcminutes, arcseconds, and turns. Enter a value, pick the units, and SnapTools shows the result instantly. Everything runs in your browser, so nothing you enter is uploaded.

The most common angle conversion in programming is degrees to radians — nearly every trig function expects radians, while humans think in degrees. This converter handles that and the full set of angular units in any direction, so whether you are writing code, doing CAD work, or reading an astronomical figure in arcseconds, the conversion is one step away.

// how to use

  1. 1 Enter an angle value in the input panel.
  2. 2 Choose the unit you're converting from and the unit you're converting to.
  3. 3 Read the converted value on the right, then copy it.

// examples

Degrees to radians
Input
180 ° → rad
Output
3.1415927 rad
Radians to degrees
Input
1 rad → °
Output
57.29578 °
Degrees to gradians
Input
90 ° → grad
Output
100 grad

// common uses

Converting degrees to radians for code and math libraries Engineering and CAD angle conversions Astronomy and navigation using arcminutes and arcseconds Working with gradians in surveying

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
Degrees, radians, gradians (gons), arcminutes, arcseconds, and turns (full revolutions), with conversion in any direction.
Exactly π radians, about 3.14159. A full circle is 2π radians, 360 degrees, 400 gradians, or 1 turn — this tool converts between all of them.
Most programming and math libraries expect angles in radians for trigonometric functions, while everyday and engineering contexts use degrees. Converting between them is the most common use of this tool.
They subdivide a degree — one degree is 60 arcminutes, and one arcminute is 60 arcseconds. They are used in astronomy, navigation, and precise angular measurement.

// related

Length Converter Area Converter Speed Converter Number Base Converter Roman Numeral Converter

Use this via API

Get a free API key → 
curl -X POST https://snaptools.dev/api/v1/tools/angle-converter \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"180 \u00b0 \u2192 rad"}'
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