The gauss, abbreviated as G, is the cgs unit of magnetic field B (which is also known as "magnetic flux density" and "magnetic induction"), named after the German mathematician and physicist Carl Friedrich Gauss. One gauss is defined as one maxwell per square centimetre.

- 1 gauss = 1 maxwell / cm
^{2}

## Unit name and convention

This unit is named after

Carl Friedrich Gauss. As with all units whose names are derived from the proper name of a person, the first letter of its

symbol is

uppercase ("G"). But when the unit is spelled out, it should always be written in

lowercase ("gauss"), unless it begins a sentence.

## Units conversions

According to the alternative cgs (centimeter-gram-second) system, the gauss is the unit of magnetic flux density (

B), whilst the

oersted is the unit of magnetic field intensity (

H). One

tesla is equal to 10

^{4} gauss, and one

ampere per meter is equal to 4π×10

^{-3} oersted .

The units for magnetic flux (Φ)—which is the product of magnetic flux density (B) and area (A), i.e., Φ = BA—are the weber (Wb) in the MKS system and the maxwell (Mx) in the CGS system. The conversion factor is 10^{8}, since flux is the product of flux density and area, area having the units of the square of distance, thus 10^{4} (flux density conversion factor) times the square of 10^{2} (linear distance conversion factor, i.e., centimeters per meter).

## Typical values

The

earth's magnetic field is 0.5 gauss, a small

iron magnet is about 100 gauss, a small

Neodymium-iron-boron (NIB) magnet is about 2,000 gauss, a big

electromagnet is about 15,000 gauss and the surface of a

neutron star is about 10

^{12} gauss.

## References