Formula
rad to Gy conversion formula
Use this relationship for a direct conversion:
Gy = rad x 0.01
Worked example
2 rad = 0.02 Gy.
This converter is for absorbed dose only; it does not calculate biological equivalent dose.
Absorbed Radiation Dose conversion
Convert Rad to Gray
1 rad (rad) equals 0.01 gray (Gy). Enter any value below to convert from rad to Gy.
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1 rad = 0.01 Gy
All Absorbed dose units
From 1 rad| Unit | Value |
|---|---|
| Nanogray nGy | 10,000,000 |
| Microgray μGy | 10,000 |
| Milligray mGy | 10 |
| Gray Gy | 0.01 |
| Kilogray kGy | 0.00001 |
| Rad rad | 1 |
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Quick reference
Rad to Gray table
| Rad (rad) | Gray (Gy) |
|---|---|
| 0.01 | 0.0001 |
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 5 | 0.05 |
| 10 | 0.1 |
| 25 | 0.25 |
| 50 | 0.5 |
| 100 | 1 |
| 1,000 | 10 |
From unit
About the rad
Exactly one hundredth of a gray.
Symbol: rad
To unit
About the gray
One joule of absorbed energy per kilogram.
Symbol: Gy
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Conversion standard
Definitions are checked against BIPM SI Brochure: gray. Calculations use full internal precision before display rounding.
View the complete absorbed radiation dose converterQuestions
rad to Gy FAQ
How do you convert rad to gray?
Use the formula Gy = rad x 0.01. 1 rad (rad) equals 0.01 gray (Gy).
Is the rad to Gy conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.