Convert Gauss to Milligauss (G to mG)
1 gauss (G) = 1000 milligauss (mG). 1 mG = 0.001 G. Example: 15 G = 15 × 1000 = 15000 mG.
Also searched as gauss to mG, gauss in mG, gauss into milligauss, G to mG, G in milligauss, G into milligauss, gauss to milligauss, G to milligauss converter and how many milligauss in a gauss.
1 G = 1000 mG
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gauss to milligauss converter to paste a column from Excel.
How to Convert Gauss to Milligauss
- 1 G = 1000 mG
- 1 mG = 0.001 G
- Example: convert 15 G to mG: 15 G = 15 × 1000 mG = 15000 mG
Formula
mG = G × 1000
Derivation from SI units:
- 1 G = 10⁻⁴ T (exact)
- 1 mG = 10⁻³ G = 10⁻⁷ T = 0.1 µT
- 1 G = 0.0001 T ÷ 1 × 10⁻⁷ T per mG = 1000 mG
Both units are defined exactly, so the factor is exact. Gauss definition: gauss; Milligauss definition: milligauss.
Worked examples
- A reading of 50 G converts to 50000 mG.
50 G × 1000 = 50000 mG - A value of 5000 G is 5000000 mG.
5000 G × 1000 = 5000000 mG
Gauss to Milligauss conversion table
| Gauss (G) | Milligauss (mG) |
|---|---|
| 0.25 G | 250 mG |
| 0.5 G | 500 mG |
| 1 G | 1000 mG |
| 10 G | 10000 mG |
| 50 G | 50000 mG |
| 100 G | 100000 mG |
| 1000 G | 1000000 mG |
| 3000 G | 3000000 mG |
| 5000 G | 5000000 mG |
| 10000 G | 10000000 mG |
| 12000 G | 12000000 mG |
| 15000 G | 15000000 mG |
Where it's used
Gauss are used for permanent magnet surface fields (for example 3000–5000 G for neodymium), while milligauss appear in EMF meters for homes and offices. Both measure magnetic flux density (B field), so the conversion is a fixed factor.
Gauss to other magnetic flux density units
| Conversion | 1 G equals |
|---|---|
| gauss to milligauss | 1000 mG |
| gauss to tesla | 0.0001 T |
| gauss to millitesla | 0.1 mT |
| gauss to microtesla | 100 µT |
| gauss to nanotesla | 100000 nT |
| gauss to kilogauss | 0.001 kG |
Frequently asked questions
How many milligauss are in 1 gauss?
1 G = 1000 mG.
How do I convert gauss to milligauss?
Multiply the value in G by 1000. For example, 15 G × 1000 = 15000 mG.
Is the G to mG conversion exact?
Yes. Both units are defined exactly, and 1 G is exactly 1000 mG.
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). Convert Gauss to Milligauss (G to mG). Retrieved October 25, 2026, from https://scientificconverters.com/magnetic-flux-density/gauss-to-milligauss/
IEEE
Scientific Converters, "Convert Gauss to Milligauss (G to mG)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/magnetic-flux-density/gauss-to-milligauss/