Unit dG decigauss Magnetic Flux Density A decigauss (dG) is a unit of magnetic flux density, which describes the strength and direction of a magnetic field at any point in space. Magnetic flux density is an important parameter in various applications such as in the study of electromagnetism, geophysics, and engineering. The gauss (G) is a unit of magnetic flux density in the centimeter-gram-second system of units (CGS), named after the German mathematician and physicist Carl Friedrich Gauss. One gauss is equal to 1 maxwell per square centimeter, where maxwell is a CGS unit of magnetic flux. In SI (International System of Units) units, 1 gauss is equal to 10-4 tesla (T), where tesla is the SI unit of magnetic flux density. A decigauss (dG), as the name suggests, is equal to one-tenth of a gauss. Therefore, 1 dG = 0.1 G or 10-5 tesla. It's a smaller unit of magnetic flux density, often used to express relatively weak magnetic fields, such as those found in the Earth's magnetic field or the magnetic fields generated by small electronic devices.