rem → Sv
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
This calculator converts radiation dose units from rem (roentgen equivalent man) to sieverts (Sv), the standard SI unit. The rem is a less common unit today, while the sievert is globally standardized. The conversion divides rem by 100 (1 Sv = 100 rem), making it useful for comparing doses in scientific, medical, or industrial contexts.
To use, input the value in rem and the result in sieverts will be calculated automatically. The formula is straightforward: Sv = rem ÷ 100. This allows converting older studies using rem to modern standards. The calculation is direct, as rem and Sv measure the same physical quantity (equivalent dose).
Cautions: Do not use this tool for medical doses without professional guidance. The conversion ignores factors like radiation type or body sensitivity. It is best suited for educational, nuclear engineering, or environmental risk analysis contexts where mathematical precision is critical.
Frequently asked questions
Why divide by 100 to convert rem to Sv?
Because 1 sievert equals 100 rem. This direct conversion maintains the ratio between the units without requiring complex calculations.
What's the difference between rem and sievert?
The rem is an outdated unit, while the sievert is the international standard. Both measure equivalent radiation dose, but Sv is preferred in science and medicine.
When should I use this calculator?
To convert historical rem data to modern standards, or compare doses in technical contexts like nuclear engineering or environmental analysis.
Can I convert large values with this tool?
Yes, the calculator handles any real-number input in rem. Simply enter the value and the Sv result will be calculated instantly.
Are there other radiation dose units?
Yes, such as gray (Gy) for absorbed dose and becquerel (Bq) for radioactivity. Each unit serves specific applications depending on the context.