Radiation Dose (Absorbed) Converter
Convert between grays, milligrays, centigrays, rads and other units of absorbed radiation dose.
1 gray = 100 rads
Most used absorbed dose units
Popular absorbed dose conversions
- Grays to rads 1 Gy = 100 rad
- Rads to grays 1 rad = 0.01 Gy
- Centigrays to rads 1 cGy = 1 rad
- Milligrays to millirads 1 mGy = 100 mrad
What is absorbed dose?
Absorbed dose is the energy deposited by ionizing radiation per kilogram of matter. The SI unit is the gray (Gy), one joule per kilogram, named after the physicist Louis Harold Gray. The older unit, the rad (radiation absorbed dose), is 0.01 Gy, so 1 rad = 1 cGy.
Absorbed dose is used in radiotherapy and radiation physics. To estimate health risk, it is weighted by the type of radiation and the tissues exposed to give the equivalent or effective dose, measured in sieverts; see the equivalent dose converter.
Absorbed dose units from smallest to largest
Every proportional absorbed dose unit on the site, ordered by size and expressed in grays.
All 10 absorbed dose units
Units
Frequently asked questions
How many rads are in a gray?
1 Gy = 100 rad; 1 rad = 1 cGy.
What is a lethal dose of radiation?
A whole-body dose of about 4–5 Gy received quickly kills about half of people without treatment.