45 Degrees to Radians
45 degrees equals π/4 (approximately 0.7854) radians.
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How to use this tool
- Enter angle and from unit in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your radians and the full breakdown beneath it.
Convert 45 degrees to radians with this angle converter.
Frequently asked questions
- How many radians are in a full circle?
- A full circle is 2*pi radians (approximately 6.2832 rad). A half circle (straight line) is pi radians (approximately 3.1416 rad), which equals 180 degrees.
- What is a gradian and who uses it?
- A gradian (also called gon or grade) divides a right angle into 100 equal parts, making a full circle 400 gradians. It is used in surveying, especially in continental Europe, because slope percentages and gradian angles align conveniently.
- What are arcminutes used for?
- Arcminutes (1/60 of a degree) and arcseconds (1/3600 of a degree) are used in astronomy, GPS coordinates, and optical precision work. A GPS coordinate like 48 degrees 51 arcminutes 24 arcseconds N pinpoints a location to about 30 metres.