How do you convert sieverts to rem?

To convert sieverts (Sv) to rem (rem), multiply the measurement in sieverts by 100 (rem = sieverts × 100).

What is 10 sieverts in rem?

10 sieverts (10 Sv) is equal to 1,000 rem (1,000 rem).

Which is larger, 1 sievert (Sv) or 1 rem (roentgen equivalent man) (rem)?

One sievert (Sv) is larger than one rem (roentgen equivalent man) (rem). Specifically, 1 Sv contains 100 rem, whereas 1 rem is 0.01 Sv.

How do I convert back from rem (rem) to sieverts (Sv)?

To reverse the calculation from rem to Sv, multiply your rem (roentgen equivalent man) value by the inverse factor 0.01 (or divide by 100). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round Sv to rem results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 10 Sv ≈ 1,000.00 rem). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Sieverts to Rem Converter

Enter the radiation dose in sieverts below to convert it to rem.

Rem to Sieverts (rem → Sv)

Convert Sieverts to Rem

Enter a value in sieverts (Sv) to convert to rem (rem).

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1,000rem

10 Sv = 1,000 rem

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Suggested Conversions

Reference:NIST OWM (SI Units — Length)

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Sievert to Rem Conversion Table

Table showing various sievert measurements converted to rem. Click any preset value or arrow to load it into the converter.

Sieverts (Sv)	Rem (rem)
1 Sv	100 rem
2 Sv	200 rem
5 Sv	500 rem
10 Sv	1,000 rem
15 Sv	1,500 rem
20 Sv	2,000 rem
25 Sv	2,500 rem
30 Sv	3,000 rem
50 Sv	5,000 rem
75 Sv	7,500 rem

How to Convert Sieverts to Rem

To convert sieverts to rem, multiply the radiation dose by the following conversion ratio: 100 rem/sievert.

Since one sievert is equal to 100 rem, you can use this simple formula to convert:

rem = sieverts × 100

The radiation dose in rem is equal to the radiation dose in sieverts multiplied by 100.

For example, here's how to convert 10 sieverts to rem using the formula above.

rem = (10 Sv × 100) = 1,000 rem

How Many Rem Are in a Sievert?

There are 100 rem in a sievert, which is why we use this value in the formula above.

1 Sv = 100 rem|1 rem = 0.01 Sv

Our sievert to rem calculator automatically converts your radiation dose measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Sieverts and rem are both units used to measure radiation dose. Keep reading to learn more about each unit.

What Is a Sievert?

SI derived unit of ionizing radiation equivalent dose (1 Sv = 100 rem). It serves as a primary reference unit for measuring radiation dose across scientific and practical applications. [1]

The sievert is classified as an International System of Units (SI) unit of radiation dose. Sieverts can be abbreviated as Sv; for example, 1 sievert can be written as 1 Sv.

As the primary coherent reference unit for radiation dose in this category, all other radiation dose units are mathematically anchored to the sievert (Sv).

In practice, sieverts (Sv) are widely used across standard radiation dose applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about sieverts in our Radiation Converter.

What Is a Rem?

A rem is a unit of radiation dose equal to 1/100 of a sievert (0.01 Sv). Traditional biological dose unit equal to 0.01 Sieverts (10 mSv). [2]

The rem is classified as a standard unit of radiation dose. Rem can be abbreviated as rem; for example, 1 rem can be written as 1 rem.

When working with rem (rem) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, rem (rem) are widely used across fine-tolerance laboratory, analytical, and micro-scale radiation dose measurements within international standard workflows, engineering documentation, and technical data sheets.

Learn more about rem in our Radiation Converter.

When converting radiation dose between sieverts (Sv) and rem (rem), keep full floating-point precision (1 Sv = 100 rem; 1 rem = 0.01 Sv) during intermediate calculations and round only the final rem figure to match your instrument tolerance.

More Sievert & Rem Conversions

Need to calculate in the opposite direction? Use our rem to sieverts converter (rem to Sv) to switch your starting unit immediately. You can also explore related tools such as converting sieverts to millisieverts, converting sieverts to microsieverts, or converting millisieverts to sieverts.

Convert from Sieverts

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Frequently Asked Questions

There are 100 rem (rem) in 1 sievert (Sv). Conversely, 1 rem (rem) is equal to 0.01 sieverts (Sv).

Radiation Converter

Quick Info

Direct Factor: 1 sievert (Sv) equals 100 rem (rem).
Inverse Factor: 1 rem (roentgen equivalent man) (rem) equals 0.01 sieverts (Sv).
Formula: rem = sieverts × 100.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Sievert (Sv)

SI derived unit of ionizing radiation equivalent dose (1 Sv = 100 rem).

Rem (Roentgen Equivalent Man) (rem)

Traditional biological dose unit equal to 0.01 Sieverts (10 mSv).

Millisievert (mSv)

Medical imaging & dosimetry unit (1 mSv = 0.001 Sv = 100 mrem).

References

[1]NIST OWM · SI Units — Length
Source
[2]BIPM · SI Base Unit: Metre (m)
Source
[3]NIST HB 133 · NIST Handbook 133 (2019 Ed.)
Source

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References

NIST · BIPM · ISO

[1]
NIST OWM (SI Units — Length)·Radiation Metrology Standard — Sieverts (Sv) to Rem (rem)
NIST OWM Standard
[2]
BIPM (SI Base Unit: Metre (m))·Unit Specifications: Sievert (Sv) & Rem (Roentgen Equivalent Man) (rem)
BIPM Specification
[3]
NIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (Sv to rem)
NIST HB 133 Reference

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