Unit Converters
Radiation Dose Converter
Radiation Dose Converter switches a radiation dose reading between gray (Gy), rad, sievert (Sv) and rem.
Gray and rad measure absorbed radiation dose; sievert and rem measure dose equivalent (which accounts for biological effect). This tool assumes a radiation quality factor of 1 (as with X-rays, gamma rays and beta radiation), where gray and sievert are numerically the same.
How to Use the Radiation Dose Converter
- Open the Radiation Dose Converter tool.
- Enter the radiation dose value you want to convert.
- Choose the unit you're converting from.
- Choose the unit you want to convert to.
- Read the converted result, updated instantly.
Frequently Asked Questions
What's the difference between gray and sievert?
Gray measures the raw physical energy absorbed per kilogram of tissue; sievert weights that by a radiation-type quality factor to estimate biological harm. For X-rays, gamma and beta radiation, the quality factor is 1, so the two are numerically equal -- but for alpha particles or neutrons, they diverge significantly.
Is this suitable for medical or occupational safety calculations?
No -- for medical, occupational or regulatory radiation-safety decisions, always consult a qualified radiation safety professional and authoritative references, not a general web tool.
How is rad related to rem?
Rad and rem follow the same relationship as gray and sievert: 1 rad = 1 rem when the quality factor is 1.