Convert Millisieverts to Nanosieverts (mSv to nSv)
1 millisievert (mSv) = 1000000 nanosieverts (nSv). 1 nSv = 0.000001 mSv. Example: 15 mSv = 15 × 1000000 = 15000000 nSv.
Also searched as millisieverts to nSv, millisieverts in nSv, millisieverts into nanosieverts, mSv to nSv, mSv in nanosieverts, mSv into nanosievert, millisievert to nanosievert, mSv to nanosieverts converter and how many nanosieverts in a millisievert.
1 mSv = 1000000 nSv
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millisievert to nanosievert converter to paste a column from Excel.
How to Convert Millisievert to Nanosievert
- 1 mSv = 1000000 nSv
- 1 nSv = 0.000001 mSv
- Example: convert 15 mSv to nSv: 15 mSv = 15 × 1000000 nSv = 15000000 nSv
Formula
nSv = mSv × 1000000
Derivation from SI units:
- 1 mSv = 10⁻³ Sv.
- 1 nSv = 10⁻⁹ Sv.
- 1 mSv = 0.001 Sv ÷ 1 × 10⁻⁹ Sv per nSv = 1000000 nSv
Both units are defined exactly, so the factor is exact. Millisievert definition: millisievert; Nanosievert definition: nanosievert.
Worked examples
- A reading of 2.4 mSv converts to 2400000 nSv.
2.4 mSv × 1000000 = 2400000 nSv - A value of 10 mSv is 10000000 nSv.
10 mSv × 1000000 = 10000000 nSv
Millisievert to Nanosievert conversion table
| Millisieverts (mSv) | Nanosieverts (nSv) |
|---|---|
| 0.01 mSv | 10000 nSv |
| 0.1 mSv | 100000 nSv |
| 1 mSv | 1000000 nSv |
| 2.4 mSv | 2400000 nSv |
| 3 mSv | 3000000 nSv |
| 7 mSv | 7000000 nSv |
| 10 mSv | 10000000 nSv |
| 20 mSv | 20000000 nSv |
| 50 mSv | 50000000 nSv |
| 100 mSv | 100000000 nSv |
Where it's used
Millisieverts are used for annual dose limits, while nanosieverts appear in environmental radiation monitoring networks. Both measure equivalent and effective radiation dose, so the conversion is a fixed factor.
Millisievert to other equivalent dose units
| Conversion | 1 mSv equals |
|---|---|
| millisievert to nanosievert | 1000000 nSv |
| millisievert to sievert | 0.001 Sv |
| millisievert to microsievert | 1000 µSv |
| millisievert to rem | 0.1 rem |
| millisievert to millirem | 100 mrem |
Frequently asked questions
How many nanosieverts are in 1 millisievert?
1 mSv = 1000000 nSv.
How do I convert millisieverts to nanosieverts?
Multiply the value in mSv by 1000000. For example, 15 mSv × 1000000 = 15000000 nSv.
Is the mSv to nSv conversion exact?
Yes. Both units are defined exactly, and 1 mSv is exactly 1000000 nSv.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
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 Millisieverts to Nanosieverts (mSv to nSv). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/millisieverts-to-nanosieverts/
IEEE
Scientific Converters, "Convert Millisieverts to Nanosieverts (mSv to nSv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/millisieverts-to-nanosieverts/