Gray to Rad Converter
Convert Gray (Gy) to Rad (rad) instantly. 1 Gy = 100 rad.
Radiation Converter
10 units available
1 Gy = 100 rad
Formula:
rad = Gy × 100With your value: 1 Gy = 100 rad
Other Gray to Rad conversions
Gray to Rad Conversion Table
| Gray (Gy) | Rad (rad) |
|---|---|
| 0.5 | 50 |
| 1 | 100 |
| 2 | 200 |
| 5 | 500 |
| 10 | 1,000 |
| 15 | 1,500 |
| 20 | 2,000 |
| 25 | 2,500 |
| 50 | 5,000 |
| 100 | 10,000 |
| 250 | 25,000 |
| 500 | 50,000 |
| 1000 | 100,000 |
Rad to Gray Conversion Table
| Rad (rad) | Gray (Gy) |
|---|---|
| 0.5 | 0.005 |
| 1 | 0.01 |
| 2 | 0.02 |
| 5 | 0.05 |
| 10 | 0.1 |
| 15 | 0.15 |
| 20 | 0.2 |
| 25 | 0.25 |
| 50 | 0.5 |
| 100 | 1 |
| 250 | 2.5 |
| 500 | 5 |
| 1000 | 10 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Gray (Gy)
Radiation
Gray and sievert are coherent SI units (J/kg). Rad and rem are exactly 0.01 Gy and 0.01 Sv; the curie is exactly 3.7 × 10¹⁰ Bq.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Rad (rad)
Radiation
Gray and sievert are coherent SI units (J/kg). Rad and rem are exactly 0.01 Gy and 0.01 Sv; the curie is exactly 3.7 × 10¹⁰ Bq.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Gray to Rad
To convert from Gray (Gy) to Rad (rad), multiply the value by 100.
Formula: rad = Gy × 100
Reverse: Gy = rad × 0.01
Step-by-Step Example
- Start with your value in Gray. For example: 5 Gy
- Multiply by the conversion factor: 5 x 100
- The result is: 500 rad
About Gray
The gray (Gy) is the SI unit of absorbed radiation dose. It measures the amount of energy deposited in a mass of matter by ionizing radiation.
Common uses: medicine, nuclear physics, radiotherapy.
About Rad
The rad is a non-SI unit of absorbed radiation dose. One rad is equal to 0.01 gray.
Common uses: legacy radiation monitoring, industrial radiation.
Frequently Asked Questions
How many Rad are in 1 Gray?
There are exactly 100 Rad in 1 Gray. This means the conversion factor from Gray to Rad is 100.
What is the formula to convert Gray to Rad?
The formula to convert Gray to Rad is: rad = Gy × 100. For example, to convert 10 Gray to Rad, you would multiply 10 by 100.
What is a Gray?
The gray (Gy) is the SI unit of absorbed radiation dose. It measures the amount of energy deposited in a mass of matter by ionizing radiation.
What is a Rad?
The rad is a non-SI unit of absorbed radiation dose. One rad is equal to 0.01 gray.
What are the common uses of Gray?
The Gray is commonly used in medicine, nuclear physics, radiotherapy.
Related Radiation Conversions
Cite this page
UnitConvertLab. (2026). Gray to Rad converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/gray-to-rad