Radians to Degrees Calculator
Radians to Degrees Calculator
Calculated rad2deg() of the number
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rad2deg() function
Degrees and radians are both units for measuring angles. A degree is 1/360th of a full revolution — 360 was likely chosen by early astronomers because it's close to the number of days in a year and divides evenly in many ways. A radian is defined geometrically: it's the angle for which the arc length along a circle equals the circle's radius, which works out to 2π radians per full revolution.
This is a free online rad2deg calculator — enter a value above and the rad2deg() result updates automatically.
Important Abbreviations to Remember
- SOH: Opposite / Hypotenuse (Sine)
- CAH: Adjacent / Hypotenuse (Cosine)
- TOA: Opposite / Adjacent (Tangent)
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Understanding the Main Trigonometric Functions
The trigonometric functions — also called circular or goniometric functions — are functions of an angle that relate the angles of a right triangle to the lengths of its sides. They're central to the study of triangles and to modeling periodic phenomena (waves, oscillations, rotation), among many other applications in physics, engineering and geometry.
Every value below is computed from a triangle inscribed in the unit circle — sine and cosine are the vertical and horizontal legs of that triangle, and the other four functions (tangent, secant, cosecant, cotangent) are ratios built from them. Drag the point around the circle to see how each ratio changes with the angle. A handful of angles (0°, 90°, 180°, 270°, 360°) make one of those ratios divide by zero — those are undefined rather than a nonsensical number.
Other Trigonometric Calculators
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