Rad to Gray Converter
Quick answer
To convert Rads to Grays, multiply by 0.01 (or divide by 100). Therefore, 1 Rad (rad) equals 0.01 Grays (Gy).
Formula: Gy = rad × 0.01. Worked example: 10 rad = 0.1 Gy.
Convert Rad (rad) to Gray (Gy) online with our free unit converter. In radiation, 1 rad = 0.01 Gy. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Rad to Gray
- Step 1 — start with the formula. Gy = rad × 0.01
- Step 2 — substitute your figure. 10 rad × 0.01
- Step 3 — read the result. 10 rad = 0.1 Gy
- Step 4 — check it in reverse. rad = Gy × 100 returns 10 rad, which matches the figure you started with.
Radiation Converter
10 units available
1 rad = 0.01 Gy
Formula:
Gy = rad × 0.01With your value: 1 rad = 0.01 Gy
Other Rad to Gray conversions
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 |
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 |
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.
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
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
How to Convert Rad to Gray
To convert from Rad (rad) to Gray (Gy), multiply the value by 0.01.
Formula: Gy = rad × 0.01
Reverse: rad = Gy × 100
Step-by-Step Example
- Start with your value in Rad. For example: 5 rad
- Multiply by the conversion factor: 5 x 0.01
- The result is: 0.05 Gy
Rad and Gray Relationship
This calculation facilitates standardized conversion between recognized units of radiation. Since 1 Rad represents a fraction of a Gray (1 Gray ≈ 100 Rads), the Gray is the larger measurement interval. Understanding the relationship between Rad and Gray is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Rad
The rad is a non-SI unit of absorbed radiation dose. One rad is equal to 0.01 gray.
Common uses of Rad: legacy radiation monitoring, industrial radiation.
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 of Gray: medicine, nuclear physics, radiotherapy.
Frequently Asked Questions
- How many Grays are in 1 Rad?
- There are exactly 0.01 Grays in 1 Rad. This means the conversion factor from Rad to Gray is 0.01.
- What is the formula to convert Rad to Gray?
- The formula to convert Rad to Gray is: Gy = rad × 0.01. For example, to convert 10 Rads to Grays, you would multiply 10 by 0.01.
- What is a Rad?
- The rad is a non-SI unit of absorbed radiation dose. One rad is equal to 0.01 gray.
- 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 are the common uses of Rad?
- The Rad is commonly used in legacy radiation monitoring, industrial radiation.
Related Radiation Conversions
Cite this page
UnitConvertLab. (2026). Rad to Gray converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/rad-to-gray