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Radiation Dose Converter

Convert between radiation dose units: Sievert, rem, rad, Gray, and millisievert.

Absorbed Dose

Gy1
mGy1000
μGy1.00000e+6
rad100
erg/g10000

Effective Dose

Sv0.001
mSv1
μSv1000
nSv1.00000e+6
rem0.1
mrem10

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-ray0.005 mSv
Chest X-ray0.1 mSv
Mammogram0.4 mSv
Flight (transatlantic)0.08 mSv
Abdominal CT scan10 mSv
Radiation therapy (total)20–80 Sv (to tumor)
Annual occupational limit20 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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