Angle Converter
1 ° = 0.0174532925 rad
About the angle category
Rotation and angles: geometry, navigation, machining, and graphics programming.
You will reach for these conversions when programming: graphics libraries often want radians while design tools show degrees, or machining and carpentry specs mixing degrees and gradians.
- A right angle: 90°, about 1.57 radians (π/2)
- A 45° roof pitch is a 50% (100 gon/2) slope guide
Popular angle conversions
Common mistakes
- Radians are dimensionless, which is why calculus uses them; degree-based formulas break in derivatives
- Gradians (400 per circle) appear mainly on European construction calculators
Frequently asked questions
Which angle units does this converter support?
5 units: Degree, Radian, Gradian, Arcminute, Arcsecond. All conversions run locally in your browser, nothing is sent to a server.
How accurate are the angle conversions?
All factors follow the official SI definitions and internationally agreed standards. Results are shown with up to 8 significant digits, which is far beyond the precision of everyday measurements.
Is this converter free?
Yes, completely free and unlimited, supported by ads. No app install, no sign-up.