Millisieverts to Sieverts Converter
Enter the radiation dose in millisieverts below to convert it to sieverts.
Convert Millisieverts to Sieverts
Enter a value in millisieverts (mSv) to convert to sieverts (Sv).
Millisievert to Sievert Conversion Table
Table showing various millisievert measurements converted to sieverts. Click any preset value or arrow to load it into the converter.
How to Convert Millisieverts to Sieverts
To convert millisieverts to sieverts, multiply the radiation dose by the following conversion ratio: 0.001 sieverts/millisievert.
Since one millisievert is equal to 0.001 sieverts, you can use this simple formula to convert:
The radiation dose in sieverts is equal to the radiation dose in millisieverts multiplied by 0.001.
For example, here's how to convert 10 millisieverts to sieverts using the formula above.
How Many Sieverts Are in a Millisievert?
There are 0.001 sieverts in a millisievert, which is why we use this value in the formula above.
Our millisievert to sievert calculator automatically converts your radiation dose measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millisieverts and sieverts are both units used to measure radiation dose. Keep reading to learn more about each unit.
What Is a Millisievert?
A millisievert is a unit of radiation dose equal to 1/1,000 of a sievert (0.001 Sv). Medical imaging & dosimetry unit (1 mSv = 0.001 Sv = 100 mrem). [1]
The millisievert is classified as a metric and SI-compatible unit of radiation dose. Millisieverts can be abbreviated as mSv; for example, 1 millisievert can be written as 1 mSv.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millisievert (mSv) a convenient decimal multiple of the sievert (Sv).
In practice, millisieverts (mSv) are widely used across fine-tolerance laboratory, analytical, and micro-scale radiation dose measurements within SI metric workflows, engineering documentation, and technical data sheets.
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. [2]
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.
When converting radiation dose between millisieverts (mSv) and sieverts (Sv), keep full floating-point precision (1 mSv = 0.001 Sv; 1 Sv = 1,000 mSv) during intermediate calculations and round only the final sievert figure to match your instrument tolerance.
More Millisievert & Sievert Conversions
Need to calculate in the opposite direction? Use our sieverts to millisieverts converter (Sv to mSv) to switch your starting unit immediately. You can also explore related tools such as converting microsieverts to sieverts, converting rem to sieverts, or converting sieverts to microsieverts.
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Radiation Metrology Standard — Millisieverts (mSv) to Sieverts (Sv)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Millisievert (mSv) & Sievert (Sv)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (mSv to Sv)