Rad to Gray Converter
Convert Rad to Gray.
Result
0
Gray (Gy)
1 Rad = 0.01 Gray (Gy)
How to convert Rad to Gray (Gy)?
Rad is an older absorbed dose unit. Gray (Gy) is the SI unit. The relationship is:
- 100 rad = 1 Gy
- 1 rad = 0.01 Gy
To convert Rad to Gray (Gy), divide the value by 100.
Formula: Gray (Gy) = Rad ÷ 100
Step-by-Step Calculation
- Take the number of Rad you want to convert (e.g., 250 rad).
- Divide that value by 100.
- The result is the value in Gray (Gy). (Example: 250 ÷ 100 = 2.5 Gy).
How to use this converter?
Enter rad and instantly get gray (Gy)—useful when converting older radiation data into SI units.
Common Rad to Gray Conversions
Quick reference guide for common rad values.
1 rad = 0.01 Gy
10 rad = 0.1 Gy
50 rad = 0.5 Gy
100 rad = 1 Gy
200 rad = 2 Gy
250 rad = 2.5 Gy
500 rad = 5 Gy
1000 rad = 10 Gy
25 rad = 0.25 Gy
75 rad = 0.75 Gy
Tip: Keep units clear
Rad and gray are absorbed dose units. If you’re dealing with biological effects, you may see rem and sievert instead.
Common Rad to Gray Conversions
| Rad Input | Gray (Gy) Result |
|---|---|
| 1 rad | 0.01 Gy |
| 10 rad | 0.1 Gy |
| 25 rad | 0.25 Gy |
| 50 rad | 0.5 Gy |
| 75 rad | 0.75 Gy |
| 100 rad | 1 Gy |
| 200 rad | 2 Gy |
| 250 rad | 2.5 Gy |
| 500 rad | 5 Gy |
| 1000 rad | 10 Gy |
Frequently Asked Questions
How do I convert rad to gray?
Divide rad by 100 to get gray (Gy).
How many Gy is 100 rad?
100 rad equals 1 Gy.
Is this conversion exact?
Yes—1 Gy is exactly 100 rad.
What is rad?
Rad is an older absorbed dose unit; 1 rad equals 0.01 joule per kilogram.
Why do some documents still use rad?
Older medical and radiation references may use rad, while modern SI usage prefers gray (Gy).