Degrees to Radians Converter

Summary

This tool converts angle measurements from degrees to radians using the standard formula: radians = degrees × π/180. Radians are the SI unit of angle and are essential in mathematics, physics, and engineering — especially in trigonometry and calculus. Enter any degree value to get the exact radian equivalent, displayed both as a decimal and as a fraction of π.

How it works

1. Enter an angle in degrees in the input field.
2. The converter applies the formula: radians = degrees × (π / 180).
3. The result is shown as a decimal and as a multiple of π (e.g., π/4).
4. Use the reference table to look up common angles instantly.
5. Click any row in the reference table to load that angle into the converter.

Use cases

• Converting degree angles to radians for trigonometric functions in programming.
• Checking radian values when studying calculus or physics.
• Preparing angles for canvas, SVG, or WebGL rotation transforms.
• Looking up common angle equivalents such as 90°, 180°, and 270°.
• Verifying manual calculations of π-based radian expressions.
• Teaching or learning the relationship between degrees and radians.

Frequently Asked Questions