Microsievert is 0.000001 sievert units.
Microsieverts to Rems Converter — uSv to rem
Convert Microsievert (uSv) to Rem (rem) using the exact conversion factor (1 microsievert = 0.0001 rem). See the formula, worked examples, conversion table, and common uses.
Microsieverts to Rems converter
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Rem is 0.01 sievert.
Result = input x 1e-6 / 0.01.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Microsieverts to Rems
Microsievert and Rem both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Microsievert is 0.000001 sievert units, and rem is 0.01 sievert.
Formula
rems = microsieverts × 0.0001
This factor comes from each unit's defined relationship to the category's base unit: 1 microsievert equals 0.000001 base units, and 1 rem equals 0.01 base units, so dividing one by the other gives the direct microsievert-to-rem factor of 0.0001.
Simple example
1 uSv × 0.0001 = 0.0001 rem
1 microsievert = 0.0001 rems.
Real-world example
10 uSv × 0.0001 = 0.001 rem
10 microsieverts = 0.001 rems.
Conversion table
| Microsievert (uSv) | Rem (rem) |
|---|---|
| 0.001 uSv | 1e-7 rem |
| 0.01 uSv | 0.000001 rem |
| 0.1 uSv | 0.00001 rem |
| 1 uSv | 0.0001 rem |
| 10 uSv | 0.001 rem |
| 100 uSv | 0.01 rem |
Reverse conversion: Rem to Microsievert
0.0001 rem × 10000 = 1 uSv
0.0001 rems = 1 microsieverts.
microsieverts = rems × 10000
For a page dedicated to this direction, see Rem to Microsievert.
Understanding the Microsievert (uSv)
Microsievert is 0.000001 sievert units.
Understanding the Rem
Rem (rem) measures equivalent radiation dose. 'Roentgen equivalent man' — the US customary unit of equivalent radiation dose, fixed at exactly 0.01 sievert. It is classified as a non-SI unit, still common in the US.
Where it's used: Still widely used in the United States alongside the SI sievert
Rem vs. sievert. Both measure equivalent radiation dose; the sievert is the modern SI unit while the rem is the older US customary unit, related by 1 sievert = 100 rem exactly.
Uses of the Rem today
- US occupational radiation dose limits and monitoring
- US nuclear regulatory reporting
- US medical radiation dose records
Rem — sources
- US NRC (Nuclear Regulatory Commission) — glossary — Definition and continued regulatory use of the rem in the United States.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many rems are in 1 microsievert?
1 microsievert equals 0.0001 rems, using the exact defined conversion factor rather than an estimate.
How do I convert microsievert to rem?
Multiply the microsievert value by 0.0001. The converter above does this instantly to whatever precision you set.
How do I convert rem back to microsievert?
Use the reverse factor: 1 rem equals 10,000 microsieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a microsievert?
Microsievert (uSv) is a unit of radiation.
What is a rem?
Rem (rem) measures equivalent radiation dose. 'Roentgen equivalent man' — the US customary unit of equivalent radiation dose, fixed at exactly 0.01 sievert. It is classified as a non-SI unit, still common in the US.
Is the microsievert to rem conversion exact?
Yes. 'Roentgen equivalent man' — the US customary unit of equivalent radiation dose, fixed at exactly 0.01 sievert. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between rem vs. sievert?
Both measure equivalent radiation dose; the sievert is the modern SI unit while the rem is the older US customary unit, related by 1 sievert = 100 rem exactly.