The angle converter is a free online tool that helps you convert between engineering units quickly and accurately. It supports 5 units including Degree (°), Radian (rad), Gradian (grad), Minute ('), Second ("). The core conversion formula is: 1 radian = 57.2958 degrees | 1 degree = π/180 radians. For example, 1 Degree equals approximately 0.017453 Radian. Conversely, 1 Radian equals approximately 57.295755 Degree. Common conversions: 5 ° = 0.087267 rad, 10 ° = 0.174533 rad, 25 ° = 0.436333 rad, 50 ° = 0.872665 rad, 100 ° = 1.74533 rad. This converter is useful for students, engineers, scientists, and professionals who need accurate engineering unit conversions. Whether you are working on homework, technical specifications, research data, or everyday measurements, this tool provides instant, reliable results. All conversions are calculated relative to a single base unit for consistency and precision across all supported units. A full circle contains 360 degrees, 2π radians, or 400 gradians. Radians are the natural unit for angles in mathematics and physics.