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Radiation (Equivalent Dose) Conversion Chart

Quick-reference radiation (equivalent dose) conversion chart. The tables below compare the most common units side by side. Download the free PDF for offline and printable use.

What is radiation dose?

Equivalent dose measures the biological effect of ionizing radiation. The SI unit is the sievert (Sv); the older unit is the rem.

FormulaSv = 100 rem

Key conversions

  • 1 sievert (Sv) = 1,000 millisieverts (mSv) = 100 rem
  • 1 rem = 10 millisieverts (mSv)
  • 1 mrem = 0.01 millisieverts (mSv) = 10 microsieverts (µSv)
  • 100 mrem = 1 rem
  • 1 mSv = 1,000 microsieverts (µSv)

Standards, method, and review

Values are calculated from the shared conversion-factor library. Exact defined relationships are preserved; displayed results are rounded only for readability.

Reviewed by All Unit Conversions Editorial Team. Updated .

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Radiation (Equivalent Dose) Conversion Table

Radiation (Equivalent Dose) conversion factors
Unitper 1 Svper 1 mSvper 1 rem
Sievert (Sv)1 Sv0.001 Sv0.01 Sv
Millisievert (mSv)1000 mSv1 mSv10 mSv
Microsievert (µSv)1000000 µSv1000 µSv10000 µSv
Roentgen Equivalent Man (rem)100 rem0.1 rem1 rem
Millirem (mrem)100000 mrem100 mrem1000 mrem

Values are calculated from the shared conversion-factor library. Exact defined relationships are preserved; displayed results are rounded only for readability.

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