Millisievert is 0.001 sievert units.
Millisievert to Femtosievert
Convert Millisievert (mSv) to Femtosievert (fSv) instantly. Free online radiation converter with formulas, tables and examples.
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Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
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Femtosievert is 1e-15 sievert units.
fSv = mSv × 1e+12
Results update instantly for Millisievert to Femtosievert conversions.
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Formula
1 Millisievert = 1e+12 Femtosievert
fSv = mSv × 1e+12
mSv = fSv ÷ 1e+12
Conversion table
| 1 mSv | 1e+12 fSv |
| 2 mSv | 2e+12 fSv |
| 5 mSv | 5e+12 fSv |
| 10 mSv | 1e+13 fSv |
| 20 mSv | 2e+13 fSv |
| 50 mSv | 5e+13 fSv |
| 100 mSv | 1e+14 fSv |
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Frequently asked questions
How many Femtosieverts are in one Millisievert?
One Millisievert equals 1e+12 Femtosieverts.
How do I convert Millisievert to Femtosievert?
Multiply the number of Millisieverts by 1e+12 to get Femtosieverts. To go the other way, multiply Femtosieverts by 1e-12 (or divide by 1e+12) to get Millisieverts.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Millisievert and Femtosievert, so the result shown is mathematically precise (rounded only for display).
When is Millisievert to Femtosievert conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
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About this conversion
Millisievert and Femtosievert are units used in the radiation family of measurements. Both units measure equivalent radiation dose (biological risk-weighted dose). This converter uses the precise relationship 1 Millisievert = 1e+12 Femtosieverts (equivalently 1 Femtosievert = 1e-12 Millisieverts), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.