Angle Converter
Convert between degrees, radians, gradians and other angle units in one click.
The Angle Converter is a free online tool that converts between degrees, radians, gradians, arcminutes and arcseconds in real time. No installation and no account needed — enter a value, pick your units, and get an accurate result instantly. It's a handy companion for anyone working with rotations, slopes, bearings, or trigonometric functions.
Why convert between angle units?
Different fields use different angle units: mathematics and physics favor radians, everyday geometry and navigation use degrees, and some surveying and European engineering standards still rely on gradians. Converting by hand risks small errors that compound in trigonometric calculations, CAD drawings, or rotation formulas — this tool removes the guesswork. Even a small mismatch between degrees and radians can throw off a formula, so having a reliable converter on hand saves time when double-checking calculations.
How to use the Angle Converter
- Type the angle value you want to convert.
- Choose the starting unit — degrees, radians, gradians, or arc minutes/seconds.
- Click Calculate to view the equivalent value across all supported units.
Key features
- Supports degrees, radians, gradians, arcminutes and arcseconds.
- Uses precise mathematical constants (π-based) for exact results.
- Instant, two-way conversion with no rounding surprises.
- Free for students, engineers, and designers — no sign-up required.
Related tools
Working with other measurements too? Try the Length Converter, Area Converter, or Torque Converter for rotational and mechanical calculations.
Frequently asked questions
Is the Angle Converter free?
Yes, it's completely free with no sign-up or usage limits. You can convert as many values as you need, with no account or payment required.
How many degrees are in a radian?
One radian equals approximately 57.2958 degrees, since a full circle is 2π radians or 360 degrees. This conversion factor comes from the fact that 2π radians make up a complete 360-degree circle.
What is a gradian?
A gradian (or gon) divides a right angle into 100 units instead of 90 degrees, so a full circle equals 400 gradians. It's still used in some surveying and engineering contexts. You'll mainly encounter gradians in older European land-surveying instruments and certain CAD software settings.
Can I convert arcminutes and arcseconds?
Yes — the tool handles arcminutes and arcseconds alongside degrees, radians, and gradians for precise angular measurements. Arcminutes and arcseconds are especially useful in astronomy and precise navigation calculations.
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