Angle Converter
degree, radian, gradian
Convert units
Instant calculation in your browser. No sign-up or upload.
180 ° = 3.141592654 rad
Calculation working
- Result = input × source factor ÷ target factor
- 180 × 1 ÷ 57.2957795130823 = 3.14159265358979 rad
- Factors refer to the same base quantity. Rounding is applied to the display, not intermediate calculations.
Display: 10 significant digits. More digits do not make the original measurement more accurate.
Try a practical example
Batch conversion
One value per line, up to 200. Uses the selected ° → rad units. Invalid rows stay visible in the results and CSV.
Compare all units
Using this angle converter
Convert angles for geometry, trigonometry, surveying and orientation inputs.
A complete turn is 360 degrees, 2π radians or 400 gradians. This converter keeps the supplied number of turns; it does not wrap an angle into 0–360°.
Check before using the result
- Calculator trigonometric functions must use the same degree/radian setting as the converted angle.
- A roof slope in percent is not an angle in degrees. Percentage slope requires an arctangent calculation.
Definitions and method: NIST: unit conversion factors and rounding. Calculations use double-precision arithmetic; the display precision can be adjusted above.
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