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Rem to Millisieverts

1 rem = 10 millisieverts · 1 mSv = 0.1 rem

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

  1. 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).

  2. Multiply by the factor written as a fraction

    Put rem in the denominator so it cancels, leaving mSv.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 10 mSv

1 rem in other units

Batch convert rem → mSv
Results
  1. 1 rem = 10 mSv
  2. 5 rem = 50 mSv
  3. 10 rem = 100 mSv
  4. 25 rem = 250 mSv

Permanent link to this conversion

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Quick examples

  • 1 rem = 10 millisieverts
  • 5 rem = 50 millisieverts
  • 10 rem = 100 millisieverts
  • 25 rem = 250 millisieverts
  • 100 rem = 1,000 millisieverts

About these units

Rem (rem)

other

Legacy unit: exactly 0.01 Sv.

1 rem = 0.01 Sv

Source: NIST SP 811 / Handbook 44

Millisievert (mSv)

SI (metric)

1 mSv = 0.001 Sv

Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)

Rem to millisieverts conversion table

rem (rem) to millisievert (mSv)
Rem (rem)Millisieverts (mSv)
0.1 rem1 mSv
0.5 rem5 mSv
1 rem10 mSv
2 rem20 mSv
3 rem30 mSv
4 rem40 mSv
5 rem50 mSv
6 rem60 mSv
7 rem70 mSv
8 rem80 mSv
9 rem90 mSv
10 rem100 mSv
15 rem150 mSv
20 rem200 mSv
25 rem250 mSv
30 rem300 mSv
40 rem400 mSv
50 rem500 mSv
75 rem750 mSv
100 rem1,000 mSv
250 rem2,500 mSv
500 rem5,000 mSv
1,000 rem10,000 mSv

Related conversions

Frequently asked questions

How do I convert rem to millisieverts?

Use mSv = rem × 10. Multiply the value in rem by 10.

How many millisieverts are in 1 rem?

1 rem (rem) equals 10 millisieverts (mSv).

How many rem are in 1 millisievert?

1 millisievert (mSv) equals 0.1 rem (rem).

What is 10 rem in mSv?

10 rem = 100 millisieverts.

What is a rem?

Legacy unit: exactly 0.01 Sv.

Formula: mSv = rem × 10. Factors last reviewed 2026-10-27.