Convert degrees, radians, gradians, turns and more instantly
Common Angles
Converted Values
Quick Reference
Need to convert angles fast? This free angle converter handles degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians all at once. Enter any value, pick your source unit, and see every equivalent instantly — no formula lookup needed. Perfect for students, engineers, programmers, and anyone working with geometry, trigonometry, or navigation.
Multiply the degree value by π/180 (approximately 0.017453). For example, 90° × π/180 = π/2 ≈ 1.5708 radians. This converter does the math automatically for you.
A gradian (also called a gon) is a unit where a full circle equals 400 gradians. It was designed to make right angles a round 100 grad, which simplifies some surveying calculations. 1 gradian = 0.9 degrees.
They are the same thing — one turn (or revolution) equals one full 360° rotation. In radians that is 2π, and in gradians it is 400 grad. Turns are convenient in contexts like rotational mechanics and animation.
Arcminutes (1/60 of a degree) and arcseconds (1/3600 of a degree) are used in astronomy, geographic coordinates, and precision optics where very small angular measurements are needed. For example, GPS coordinates are often expressed in degrees, arcminutes, and arcseconds.