Milligray to Gray Converter
Convert Milligray (mGy) to Gray (Gy) instantly. 1 mGy = 0.001 Gy.
Radiation Converter
10 units available
1 mGy = 0.001 Gy
Formula:
Gy = mGy × 0.001With your value: 1 mGy = 0.001 Gy
Other Milligray to Gray conversions
Milligray to Gray Conversion Table
| Milligray (mGy) | Gray (Gy) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Gray to Milligray Conversion Table
| Gray (Gy) | Milligray (mGy) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1000 | 1,000,000 |
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.
Milligray (mGy)
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 Milligray to Gray
To convert from Milligray (mGy) to Gray (Gy), multiply the value by 0.001.
Formula: Gy = mGy × 0.001
Reverse: mGy = Gy × 1,000
Step-by-Step Example
- Start with your value in Milligray. For example: 5 mGy
- Multiply by the conversion factor: 5 x 0.001
- The result is: 0.005 Gy
About Milligray
The milligray (mGy) is a unit of radiation dose. One milligray equals 0.001 grays. UnitConvertLab converts it against every other radiation unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: radiation calculations, engineering and science, education.
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.
Frequently Asked Questions
How many Gray are in 1 Milligray?
There are exactly 0.001 Gray in 1 Milligray. This means the conversion factor from Milligray to Gray is 0.001.
What is the formula to convert Milligray to Gray?
The formula to convert Milligray to Gray is: Gy = mGy × 0.001. For example, to convert 10 Milligray to Gray, you would multiply 10 by 0.001.
What is a Milligray?
The milligray (mGy) is a unit of radiation dose. One milligray equals 0.001 grays. UnitConvertLab converts it against every other radiation unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
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 Milligray?
The Milligray is commonly used in radiation calculations, engineering and science, education.
Related Radiation Conversions
Cite this page
UnitConvertLab. (2026). Milligray to Gray converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/milligray-to-gray