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Key Features
Instant Calculation
Get accurate results in real time with our optimized algorithm.
Mobile Friendly
Fully responsive design. Works on all devices & screen sizes.
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100% Free
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Angles show up in different units depending on the field: degrees in everyday and navigation contexts, radians in mathematics and programming, gradians in surveying, and arcminutes/arcseconds in astronomy and precision measurement.
This converter handles all of them, using degrees as the common reference point.
How it works
Enter a value, choose the unit you're converting from, and the unit you want to convert to. The tool converts through degrees as a common base and returns the result.
- Enter value.
- Enter from.
- Enter to.
- Click Calculate to see your results.
Examples
Converting a half turn
180 degrees converts to approximately 3.14159 radians (π radians).
Who should use it
- Converting between degrees and radians for programming or math work.
- Converting gradians for surveying or engineering calculations.
Industry applications
- Mathematics and engineering
- Astronomy and surveying
Advantages
- Covers six angle units in one tool, from everyday degrees to specialized astronomical units.
- Uses precise conversion factors, not rounded approximations.
Common mistakes to avoid
- Passing degrees into a programming function that expects radians (or vice versa), producing wildly incorrect trigonometric results.
- Confusing arcminutes/arcseconds (angle units) with minutes/seconds (time units).
Best practices
- Always double-check which angle unit a formula, function, or instrument expects before plugging in a value — degrees and radians are the most commonly confused pair.
Tips
- When working in code, remember most math libraries (JavaScript's Math object, Python's math module, etc.) expect radians — convert from degrees first if your input is in degrees.