Convert Milligauss to Gauss (mG to G)
1 milligauss (mG) = 0.001 gauss (G). 1 G = 1000 mG. Example: 15 mG = 15 × 0.001 = 0.015 G.
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1 mG = 0.001 G
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk milligauss to gauss converter to paste a column from Excel.
How to Convert Milligauss to Gauss
- 1 mG = 0.001 G
- 1 G = 1000 mG
- Example: convert 15 mG to G: 15 mG = 15 × 0.001 G = 0.015 G
Formula
G = mG ÷ 1000
Derivation from SI units:
- 1 mG = 10⁻³ G = 10⁻⁷ T = 0.1 µT
- 1 G = 10⁻⁴ T (exact)
- 1 mG = 1 × 10⁻⁷ T ÷ 0.0001 T per G = 0.001 G
Both units are defined exactly, so the factor is exact. Milligauss definition: milligauss; Gauss definition: gauss.
Worked examples
- A reading of 2 mG converts to 0.002 G.
2 mG × 0.001 = 0.002 G - A value of 10 mG is 0.01 G.
10 mG × 0.001 = 0.01 G
Milligauss to Gauss conversion table
| Milligauss (mG) | Gauss (G) |
|---|---|
| 0.1 mG | 0.0001 G |
| 0.5 mG | 0.0005 G |
| 1 mG | 0.001 G |
| 2 mG | 0.002 G |
| 3 mG | 0.003 G |
| 4 mG | 0.004 G |
| 10 mG | 0.01 G |
| 100 mG | 0.1 G |
| 500 mG | 0.5 G |
| 1000 mG | 1 G |
Where it's used
Milligauss are used for EMF meters for homes and offices, while gauss appear in permanent magnet surface fields (for example 3000–5000 G for neodymium). Both measure magnetic flux density (B field), so the conversion is a fixed factor.
Milligauss to other magnetic flux density units
| Conversion | 1 mG equals |
|---|---|
| milligauss to gauss | 0.001 G |
| milligauss to tesla | 1 × 10⁻⁷ T |
| milligauss to millitesla | 0.0001 mT |
| milligauss to microtesla | 0.1 µT |
| milligauss to nanotesla | 100 nT |
| milligauss to kilogauss | 0.000001 kG |
Frequently asked questions
How many gauss are in 1 milligauss?
1 mG = 0.001 G.
How do I convert milligauss to gauss?
Multiply the value in mG by 0.001, or divide it by 1000. For example, 15 mG × 0.001 = 0.015 G.
Is the mG to G conversion exact?
Yes. Both units are defined exactly, and 1 mG is exactly 0.001 G.
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 Milligauss to Gauss (mG to G). Retrieved October 25, 2026, from https://scientificconverters.com/magnetic-flux-density/milligauss-to-gauss/
IEEE
Scientific Converters, "Convert Milligauss to Gauss (mG to G)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/magnetic-flux-density/milligauss-to-gauss/