Radiation Converter
Convert between sieverts, rem, grays, and rads.
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Radiation: absorbed dose (Gy) vs equivalent dose (Sv). Older US units: rad and rem. Essential for radiation safety and medical imaging.
Absorbed vs Equivalent Dose
Gy = energy deposited. Sv = biological effect (accounts for radiation type). 1 Gy alpha = 20 Sv equivalent.
Background Radiation
Average: 2.4 mSv/yr natural. Chest X-ray: 0.02 mSv. CT scan: 2–20 mSv.
How to Use This Calculator
- Select 'Radiation'
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- Enter the value
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Applications
Medical Imaging
Dental X-ray: 0.005 mSv. Chest CT: 7 mSv. Convert to rem (1 mSv = 100 mrem) for US compliance.
Occupational Safety
Annual limit: 20 mSv (2 rem) averaged over 5 years, max 50 mSv (5 rem) in one year.
Nuclear Industry
Workers track dose in mSv. US regs use rem. Converting is routine for international operations.
Frequently Asked Questions
How do you convert Sv to rem?
Multiply by 100. 5 mSv = 500 mrem. 1 Sv = 100 rem.
How do you convert Gy to rad?
Multiply by 100. 2 Gy = 200 rad.
Safe radiation level?
Public: 1 mSv/yr above background. Workers: 20 mSv/yr avg. Sydney-London flight: ~0.1 mSv.