Science
Radiation Converter
Convert between sieverts, rems, grays and rads. 1 Sv = 100 rem; 1 Gy = 100 rad. A chest X-ray delivers about 0.1 mSv; average yearly background is ~3 mSv.
Frequently asked questions
What is the difference between gray and sievert?
Gray measures absorbed energy dose (joules per kilogram); sievert adjusts that dose by radiation type and tissue sensitivity to estimate biological effect. For X-rays and gamma rays, 1 Gy ≈ 1 Sv.
How do I convert rem to sieverts?
Divide rems by 100: 1 rem = 0.01 Sv = 10 mSv.