Angle Calculator — Calculate Angles, Degrees, Radians & Conversions

Angle Calculator

Calculate angles, convert between degrees and radians, find complementary and supplementary angles, and solve triangle angles. A comprehensive tool for geometry, trigonometry, and math applications.

Step 1: Angle Input

45°

Understanding Angles

An angle is formed by two rays (arms) with a common endpoint (vertex). Angles are measured in degrees (°), radians, or gradians. A full circle is 360°, 2π radians, or 400 gradians.

Step 2: Angle Operations

About Angle Operations

Complementary angles sum to 90°, supplementary angles sum to 180°, and triangle interior angles sum to 180°. Trigonometric functions (sin, cos, tan) relate angles to side ratios in right triangles.

Angle Calculation Results

Summary
Unit Conversion
Trigonometry

Primary Angle

45°
Acute Angle
45°
In Radians
0.785
In Gradians
50
Complementary
45°
Supplementary
135°

Angle Unit Conversions

Unit Value Full Circle Right Angle

Angle Conversion Formulas

Degrees to Radians: radians = degrees × π/180

Radians to Degrees: degrees = radians × 180/π

Degrees to Gradians: gradians = degrees × 400/360

Gradians to Degrees: degrees = gradians × 360/400

Trigonometric Values

Function Value Reciprocal Value

Need Math Tutoring?

Connect with our certified math tutors for personalized help with geometry, trigonometry, and calculus. Get one-on-one sessions tailored to your learning needs.

Get Math Tutoring