Angle Calculator
Convert angles between degrees, radians, and gradians. Find complementary and supplementary angles, plus sine, cosine, and tangent values.
Inputs
°
Results
Degrees
45°
Radians0.785398
Gradians50
Complementary (90° - θ)45°
Supplementary (180° - θ)135°
sin(θ)0.707107
cos(θ)0.707107
tan(θ)1
How to Use This Calculator
- Enter an angle in degrees in the Angle field; the calculator converts to radians (rad = deg × π/180) and gradians.
- Complementary angle = 90° − θ; Supplementary angle = 180° − θ (displayed only when geometrically meaningful).
- All six trigonometric values (sin, cos, tan, csc, sec, cot) are computed at the entered angle.
- Tan, sec, and cot are undefined at certain angles (e.g., tan 90°); the calculator flags these cases.
- Use the Slope Calculator to convert a rise/run ratio into the equivalent angle of inclination.
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