How to convert millisieverts to rems
rem = mSv × 0.1Multiply the value in millisieverts by 0.1. To go the other way, multiply by 10 (or divide by 0.1).
A millisievert is smaller than a rem: it takes 10 millisieverts to make one rem.
Worked examples
- 1 millisievert1 mSv × 0.1 = 0.1 rem
- 5 millisieverts5 mSv × 0.1 = 0.5 rem
- 10 millisieverts10 mSv × 0.1 = 1 rem
- 20 millisieverts20 mSv × 0.1 = 2 rem
- 100 millisieverts100 mSv × 0.1 = 10 rem
Millisieverts to rems conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Millisieverts (mSv) | Rems (rem) |
|---|---|
| 0.1 mSv | 0.01 rem |
| 0.25 mSv | 0.025 rem |
| 0.5 mSv | 0.05 rem |
| 1 mSv | 0.1 rem |
| 2 mSv | 0.2 rem |
| 3 mSv | 0.3 rem |
| 4 mSv | 0.4 rem |
| 5 mSv | 0.5 rem |
| 6 mSv | 0.6 rem |
| 7 mSv | 0.7 rem |
| 8 mSv | 0.8 rem |
| 9 mSv | 0.9 rem |
| 10 mSv | 1 rem |
| Millisieverts (mSv) | Rems (rem) |
|---|---|
| 12 mSv | 1.2 rem |
| 15 mSv | 1.5 rem |
| 20 mSv | 2 rem |
| 25 mSv | 2.5 rem |
| 30 mSv | 3 rem |
| 40 mSv | 4 rem |
| 50 mSv | 5 rem |
| 75 mSv | 7.5 rem |
| 100 mSv | 10 rem |
| 250 mSv | 25 rem |
| 500 mSv | 50 rem |
| 1,000 mSv | 100 rem |
About the units
Millisievert (mSv)
Annual occupational limits and medical-imaging doses are quoted in mSv. One millisievert equals 0.001 sieverts (Sv).
Rem (rem)
“Roentgen equivalent man”: exactly 0.01 Sv.
Frequently asked questions
How many rems are in one millisievert?
There are 0.1 rems in one millisievert, and this value is exact by definition.
How do I convert millisieverts to rems?
Multiply the number of millisieverts by 0.1. For example, 10 mSv × 0.1 = 1 rem.
How many millisieverts are in one rem?
One rem equals 10 millisieverts. That is the reverse factor, 1 ÷ 0.1.
What is 10 millisieverts in rems?
10 mSv = 1 rem.
Is this mSv to rem converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.