Angle Converter
Fast, accurate angle conversions, right in your browser.
The Angle Converter converts angle between common units — degrees, radians, gradians — instantly and accurately. Enter a value in one unit and see it converted to all supported units at once.
Whether you're working on an engineering calculation, a recipe, a science assignment or converting specs from an international source, this tool eliminates manual conversion-factor lookups and rounding errors.
How to Convert angle
- Enter your value and select the starting unit
- Choose the unit you want to convert to
- The converted result appears instantly
Best Practices
- Double-check which unit variant is expected (e.g. US vs. metric) for your specific use case
- For engineering or scientific work, verify precision requirements against the tool's decimal output
- Bookmark this tool for quick repeated conversions
This tool is free to use with no signup required.
Frequently Asked Questions
What angle units does this converter support?
Common units include degrees, radians, gradians, and sometimes minutes/seconds of arc.
How do I convert degrees to radians?
Multiply the degree value by π/180 (approximately 0.01745) to get radians.
Why do math and physics often use radians instead of degrees?
Radians are the natural unit for angle in calculus and trigonometry, since they directly relate arc length to radius, simplifying many mathematical formulas compared to degrees.
What is a gradian?
A gradian (or gon) divides a full circle into 400 units instead of 360 degrees or 2π radians — used in some surveying and engineering contexts, especially in parts of Europe.
Is this tool free to use?
Yes, completely free with no signup, no limits and no software to install.
Is my data saved anywhere?
No — conversions run in your browser and the values you enter are not stored or sent to a server.
How many radians are in a full circle?
A full circle equals 2π radians (approximately 6.283 radians), equivalent to 360 degrees.
Is this useful for programming or game development?
Yes — many programming languages' math functions (like sin/cos) expect radians, while user-facing angle values are often in degrees, making this a common conversion need for developers.
What is 90 degrees in radians?
90 degrees equals π/2 radians, approximately 1.5708 radians.
Is this useful for navigation or surveying?
Yes — bearings and angles in navigation and land surveying are sometimes expressed in different unit systems, and this tool helps translate between them.
