Radiology: equivalent dose converter
Equivalent dose (sievert, rem) weights absorbed dose by radiation type. This is a unit converter, not medical or safety advice.
1 rem = 10 millisieverts
How it’s calculated
mSv = rem × 10
- Multiply the value in rem by 10.
- To go back, divide by 10 (or multiply by 0.1).
- 1 rem = 10 mSv · 1 mSv = 0.1 rem
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 rem = 0.01 Sv and 1 mSv = 0.001 Sv, so 1 rem = 10 mSv. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.) (SI prefixes and accepted units).
Multiply by the factor written as a fraction
Put rem in the denominator so it cancels, leaving mSv.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 10 mSv
1 rem in other units
Batch convert rem → mSv
- 1 rem = 10 mSv
- 5 rem = 50 mSv
- 10 rem = 100 mSv
- 25 rem = 250 mSv
Common radiology: equivalent dose conversions
Radiology: equivalent dose units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Sievert (Sv) | SI (metric) | Base unit |
| Millisievert (mSv) | SI (metric) | 1 mSv = 0.001 Sv |
| Microsievert (µSv) | SI (metric) | 1 µSv = 0.000001 Sv |
| Rem (rem) | other | 1 rem = 0.01 Sv |
| Millirem (mrem) | other | 1 mrem = 0.00001 Sv |
Rem to millisieverts conversion table
| Rem (rem) | Millisieverts (mSv) |
|---|---|
| 0.1 rem | 1 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 |
| 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 |
Frequently asked questions
Which radiology: equivalent dose units can I convert?
sieverts (Sv), millisieverts (mSv), microsieverts (µSv), rem (rem), millirem (mrem).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.