Radiation Dose Converter
Convert between radiation dose units: Sievert, rem, rad, Gray, and millisievert.
Absorbed Dose
| Gy | 1 |
| mGy | 1000 |
| μGy | 1.00000e+6 |
| rad | 100 |
| erg/g | 10000 |
Effective Dose
| Sv | 0.001 |
| mSv | 1 |
| μSv | 1000 |
| nSv | 1.00000e+6 |
| rem | 0.1 |
| mrem | 10 |
Absorbed vs. Effective Dose
Absorbed dose (Gy/rad) measures energy deposited in tissue. Effective dose (Sv/rem) accounts for radiation type and tissue sensitivity — it is used for radiation protection purposes.
Reference Exposures
| Background radiation (annual avg) | 2.4 mSv/year |
| Dental X-ray | 0.005 mSv |
| Chest X-ray | 0.1 mSv |
| Mammogram | 0.4 mSv |
| Flight (transatlantic) | 0.08 mSv |
| Abdominal CT scan | 10 mSv |
| Radiation therapy (total) | 20–80 Sv (to tumor) |
| Annual occupational limit | 20 mSv/year |
About this tool
A radiation dose converter helps professionals and students quickly translate between different measurement units for radiation exposure. Radiation dose can be expressed in several ways—absorbed dose (Gy or rad), effective dose (Sv or rem)—and converting between these scales is essential for medical imaging, radiation safety, and scientific research.
To use this tool, simply enter a numeric value in your source unit, select the target unit, and the conversion happens instantly. Whether you're comparing dose reports across different countries, understanding radiation therapy protocols, or checking occupational safety limits, this converter handles the math for you. The tool includes Sievert (Sv), rem, rad, Gray (Gy), and millisievert (mSv)—covering both modern SI units and older CGS standards.
Radiation professionals rely on accurate unit conversions to ensure patient safety and regulatory compliance. Scientists may need to compare historical data recorded in rem to current standards in Sievert. Students can explore the relationships between absorbed and effective dose without memorizing conversion factors, making this tool useful for education and reference across healthcare, physics, and environmental protection fields.
Frequently Asked Questions
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