Sievert to Rem Converter — Equivalent Radiation Dose

Convert equivalent dose between sieverts, millisieverts, microsieverts, rems, and millirems.

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How this conversion works. Equivalent dose is converted through the sievert; the rem relation (1 Sv = 100 rem exactly) follows US NRC — Measuring Radiation. Unit conversion only — this does not assess dose, risk, or safety, and is not medical advice.

How to use

  1. Pick the unit you are converting from, such as Sievert (Sv) or Millisievert (mSv).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Microrem (µrem) included.

Frequently asked questions

How do I convert millisievert to millirem?

1 millisievert = 100 millirem. Choose "Millisievert (mSv)" as From and "Millirem (mrem)" as To, type a value, and the result updates instantly.

How many mrem is 1 mSv?

100 mrem. US dose reports use mrem, international ones mSv — average US background exposure is ~620 mrem/year, i.e. 6.2 mSv.

Does converting Sv to rem change the health meaning?

No — both already include the radiation weighting factor. The conversion is purely numeric (×100). What it does not do is tell you whether a given dose is safe; that depends on context and regulation.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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