Convert Nanosieverts to Millisieverts (nSv to mSv)
1 nanosievert (nSv) = 0.000001 millisieverts (mSv). 1 mSv = 1000000 nSv. Example: 15 nSv = 15 × 0.000001 = 0.000015 mSv.
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1 nSv = 0.000001 mSv
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk nanosievert to millisievert converter to paste a column from Excel.
How to Convert Nanosievert to Millisievert
- 1 nSv = 0.000001 mSv
- 1 mSv = 1000000 nSv
- Example: convert 15 nSv to mSv: 15 nSv = 15 × 0.000001 mSv = 0.000015 mSv
Formula
mSv = nSv ÷ 1000000
Derivation from SI units:
- 1 nSv = 10⁻⁹ Sv.
- 1 mSv = 10⁻³ Sv.
- 1 nSv = 1 × 10⁻⁹ Sv ÷ 0.001 Sv per mSv = 0.000001 mSv
Both units are defined exactly, so the factor is exact. Nanosievert definition: nanosievert; Millisievert definition: millisievert.
Worked examples
- A reading of 150 nSv converts to 0.00015 mSv.
150 nSv × 0.000001 = 0.00015 mSv - A value of 500 nSv is 0.0005 mSv.
500 nSv × 0.000001 = 0.0005 mSv
Nanosievert to Millisievert conversion table
| Nanosieverts (nSv) | Millisieverts (mSv) |
|---|---|
| 10 nSv | 0.00001 mSv |
| 50 nSv | 0.00005 mSv |
| 100 nSv | 0.0001 mSv |
| 150 nSv | 0.00015 mSv |
| 200 nSv | 0.0002 mSv |
| 300 nSv | 0.0003 mSv |
| 500 nSv | 0.0005 mSv |
| 1000 nSv | 0.001 mSv |
| 5000 nSv | 0.005 mSv |
| 10000 nSv | 0.01 mSv |
Where it's used
Nanosieverts are used for environmental radiation monitoring networks, while millisieverts appear in annual dose limits. Both measure equivalent and effective radiation dose, so the conversion is a fixed factor.
Nanosievert to other equivalent dose units
| Conversion | 1 nSv equals |
|---|---|
| nanosievert to millisievert | 0.000001 mSv |
| nanosievert to sievert | 1 × 10⁻⁹ Sv |
| nanosievert to microsievert | 0.001 µSv |
| nanosievert to rem | 1 × 10⁻⁷ rem |
| nanosievert to millirem | 0.0001 mrem |
Frequently asked questions
How many millisieverts are in 1 nanosievert?
1 nSv = 0.000001 mSv.
How do I convert nanosieverts to millisieverts?
Multiply the value in nSv by 0.000001, or divide it by 1000000. For example, 15 nSv × 0.000001 = 0.000015 mSv.
Is the nSv to mSv conversion exact?
Yes. Both units are defined exactly, and 1 nSv is exactly 0.000001 mSv.
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 Nanosieverts to Millisieverts (nSv to mSv). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/nanosieverts-to-millisieverts/
IEEE
Scientific Converters, "Convert Nanosieverts to Millisieverts (nSv to mSv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/nanosieverts-to-millisieverts/