Gauss (G)
The gauss is the CGS unit of magnetic flux density, exactly 10⁻⁴ tesla, so 10 000 G = 1 T. It is still widely used for magnets and gaussmeters.
Symbol: G
Quantity: magnetic flux density (B field)
SI relation: 1 G = 0.0001 T (exact)
Derivation: 1 G = 10⁻⁴ T (exact)
Exact: yes, by definition
History
Named after Carl Friedrich Gauss. The SI replaced it with the tesla, but magnet suppliers and gaussmeters often still quote gauss.
Typical uses
- Permanent magnet surface fields (for example 3000–5000 G for neodymium)
- Gaussmeter readings
- Older physics and engineering literature
Convert gauss to other units
| Conversion | 1 G equals | Reverse |
|---|---|---|
| gauss to tesla | 0.0001 T | tesla to gauss |
| gauss to millitesla | 0.1 mT | millitesla to gauss |
| gauss to microtesla | 100 µT | microtesla to gauss |
| gauss to milligauss | 1000 mG | milligauss to gauss |
| gauss to nanotesla | 100000 nT | nanotesla to gauss |
| gauss to kilogauss | 0.001 kG | kilogauss to gauss |
Open the Magnetic Flux Density Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "gauss".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Gauss (G). Retrieved October 25, 2026, from https://scientificconverters.com/units/gauss/
IEEE
Scientific Converters, "Gauss (G)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/gauss/