How to convert rems to millisieverts
mSv = rem × 10Multiply the value in rems by 10. To go the other way, multiply by 0.1 (or divide by 10).
A rem is larger than a millisievert: one rem contains 10 millisieverts.
Worked examples
- 1 rem1 rem × 10 = 10 mSv
- 5 rems5 rem × 10 = 50 mSv
- 10 rems10 rem × 10 = 100 mSv
- 20 rems20 rem × 10 = 200 mSv
- 100 rems100 rem × 10 = 1,000 mSv
Rems to millisieverts conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Rems (rem) | Millisieverts (mSv) |
|---|---|
| 0.1 rem | 1 mSv |
| 0.25 rem | 2.5 mSv |
| 0.5 rem | 5 mSv |
| 1 rem | 10 mSv |
| 2 rem | 20 mSv |
| 3 rem | 30 mSv |
| 4 rem | 40 mSv |
| 5 rem | 50 mSv |
| 6 rem | 60 mSv |
| 7 rem | 70 mSv |
| 8 rem | 80 mSv |
| 9 rem | 90 mSv |
| 10 rem | 100 mSv |
| Rems (rem) | Millisieverts (mSv) |
|---|---|
| 12 rem | 120 mSv |
| 15 rem | 150 mSv |
| 20 rem | 200 mSv |
| 25 rem | 250 mSv |
| 30 rem | 300 mSv |
| 40 rem | 400 mSv |
| 50 rem | 500 mSv |
| 75 rem | 750 mSv |
| 100 rem | 1,000 mSv |
| 250 rem | 2,500 mSv |
| 500 rem | 5,000 mSv |
| 1,000 rem | 10,000 mSv |
About the units
Rem (rem)
“Roentgen equivalent man”: exactly 0.01 Sv.
Millisievert (mSv)
Annual occupational limits and medical-imaging doses are quoted in mSv. One millisievert equals 0.001 sieverts (Sv).
Frequently asked questions
How many millisieverts are in one rem?
There are 10 millisieverts in one rem, and this value is exact by definition.
How do I convert rems to millisieverts?
Multiply the number of rems by 10. For example, 10 rem × 10 = 100 mSv.
How many rems are in one millisievert?
One millisievert equals 0.1 rems. That is the reverse factor, 1 ÷ 10.
What is 10 rems in millisieverts?
10 rem = 100 mSv.
Is this rem to mSv 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.