Angle Converter
Convert degrees, radians and gradians.
✓ Professional standard Uses precise SI and internationally agreed conversion factors for accurate, standards-based results.
Angle Converter is a free online converter from Toolinza. Convert degrees, radians and gradians. It runs entirely in your browser — your data is never uploaded — needs no signup, and works on any device. Toolinza offers 293+ free tools used by people across the UK, USA, Canada, Australia, the EU, India, Pakistan, the Middle East and worldwide.
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About the Angle Converter
Angles are measured in degrees for everyday use, radians in mathematics and physics, and gradians in some surveying. Switching between them is essential when a formula expects one unit and your figure is in another — a common source of errors in trigonometry.
This Angle Converter switches between degrees, radians and gradians instantly, so your calculations use the right unit.
How to use the Angle Converter
- Enter the angle value.
- Choose the unit you are converting from.
- Choose the unit you are converting to.
- Read the converted angle instantly.
Key features of the Angle Converter
- Converts degrees, radians and gradians
- Precise conversions
- Two-way conversion
- Essential for trigonometry
- Private — calculated in your browser
How the Angle Converter works
Every conversion uses the exact, internationally agreed factors defined by the International System of Units (SI) and recognised standards bodies. Temperature conversions apply the correct formulas rather than simple multipliers, and results retain full precision so they are suitable for scientific, engineering and everyday use alike.
All conversions are calculated instantly in your browser.
Tips & best practices
- Most programming languages and physics formulas expect radians, so convert from degrees before using them.
- A full circle is 360 degrees, 2 pi radians or 400 gradians — handy reference points.
- Mixing degrees and radians is the classic trig mistake, so always check the unit first.
Standards & accuracy
Uses precise SI and internationally agreed conversion factors for accurate, standards-based results.
Results are accurate to standard conversion factors. For everyday use you can round sensibly; for scientific, medical or engineering work, keep the full precision the tool provides.
Who uses the Angle Converter?
- Trigonometry and calculus
- Physics and engineering formulas
- Programming that uses radians
- Surveying and technical drawing
Privacy & security
The Angle Converter runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.
Why choose Toolinza?
- 100% free — no hidden charges, watermarks or usage caps.
- Private & secure — your data stays on your device.
- Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
- Works everywhere — desktop, tablet and mobile.
Frequently asked questions
Multiply the degrees by pi and divide by 180. For example, 180 degrees is pi radians. The converter does this instantly.
Radians are the natural unit for mathematics and physics, and most programming trig functions expect them, so converting avoids errors.
A gradian divides a right angle into 100 units, so a full circle is 400 gradians. It is used in some surveying and engineering contexts.
Yes. The Angle Converter is completely free with no signup, no watermarks and no usage limits. Toolinza is supported by unobtrusive advertising so every tool stays free.
Absolutely. This tool runs entirely in your browser — your data and files are never uploaded to any server, so everything stays private on your own device.
No. The Angle Converter works instantly in any modern web browser on desktop, tablet and mobile — Windows, macOS, Linux, Android and iOS.