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Convert Sieverts (Sv) to Rem instantly with our accurate radiation dose equivalent converter
1 Sievert (Sv) = 100 Rem
Formula: rem = Sv × 100
| Sieverts (Sv) | Rem |
|---|---|
| 0.001 | 0.1 |
| 0.005 | 0.5 |
| 0.01 | 1 |
| 0.02 | 2 |
| 0.05 | 5 |
| 0.1 | 10 |
| 0.25 | 25 |
| 0.5 | 50 |
| 1 | 100 |
| 2 | 200 |
| 5 | 500 |
| 10 | 1000 |
The Sievert (Sv) is the SI unit of radiation dose equivalent, named after Swedish physicist Rolf Sievert. It measures the health effect of ionizing radiation on the human body, accounting for both the energy deposited and the biological effectiveness of different types of radiation. One Sievert represents a large dose of radiation that would have significant health consequences, which is why exposures are typically measured in millisieverts (mSv) or microsieverts (µSv). The Sievert provides a standardized way to compare the biological impact of different radiation types and is essential for radiation protection and safety standards worldwide.
Rem (Roentgen Equivalent Man) is a traditional unit of radiation dose equivalent used primarily in the United States. Like the Sievert, it measures the biological effect of radiation exposure on human tissue. The rem was developed before international standardization on SI units and remains in use, particularly in U.S. regulatory contexts and older scientific literature. One rem equals 0.01 Sieverts (or 10 millisieverts). While the international scientific community has largely adopted the Sievert, the rem is still commonly used in U.S. nuclear industry regulations, medical physics, and radiation safety documentation.
Converting between Sieverts and Rem is straightforward:
Example: Convert 0.05 Sv to Rem
0.05 Sv × 100 = 5 Rem
Reverse conversion (Rem to Sieverts):
Divide the Rem value by 100 to get Sieverts
Understanding radiation dose equivalents is crucial in various fields:
This converter is for educational and informational purposes only. Radiation exposure is a serious matter that requires proper measurement equipment and professional expertise.
Always use calibrated radiation detection instruments for actual dose measurements. Never attempt to estimate radiation exposure without proper equipment. If you work with or near radiation sources, follow all safety protocols and regulatory requirements established by your institution and governing bodies such as the Nuclear Regulatory Commission (NRC) or International Atomic Energy Agency (IAEA).
In case of suspected radiation exposure, seek immediate medical attention and contact radiation safety personnel or emergency services.
Gray (Gy) measures absorbed dose - the energy deposited per unit mass - while Sievert (Sv) measures equivalent dose, which accounts for the biological effectiveness of different radiation types. For gamma and X-rays, 1 Gy = 1 Sv, but for alpha particles, 1 Gy = 20 Sv due to their higher biological impact.
Sievert is the international SI unit adopted globally, while Rem is the traditional unit still used in the United States. The conversion is simple: 1 Sv = 100 rem. Both measure the same thing - equivalent radiation dose to biological tissue.
The International Commission on Radiological Protection (ICRP) recommends a limit of 1 mSv/year (0.1 rem/year) for public exposure beyond background radiation. Occupational workers may be exposed to up to 50 mSv/year (5 rem/year) under controlled conditions with proper monitoring.
Acute doses above 1 Sv (100 rem) can cause radiation sickness. Doses of 4-5 Sv (400-500 rem) are lethal to about 50% of people without medical treatment. However, chronic low-dose exposure has different effects, and there is ongoing research about cancer risk at low doses below 100 mSv (10 rem).
No. Smartphone apps claiming to measure radiation are not reliable and should never be used for safety decisions. Radiation detection requires specialized, calibrated equipment such as Geiger counters, scintillation detectors, or dosimeters. Always use professional-grade instruments for radiation measurements.
ALARA stands for "As Low As Reasonably Achievable" - a fundamental principle in radiation protection. It means that even doses below regulatory limits should be minimized. Radiation work should optimize protection through time limitation, distance, and shielding.
Medical radiation procedures are carefully controlled to ensure benefits outweigh risks. A typical CT scan delivers about 10 mSv (1 rem), while a chest X-ray is only 0.1 mSv (0.01 rem). Medical professionals follow ALARA principles and only prescribe imaging when medically necessary.