Milligray is 0.001 gray units.
Milligray to Attogray
Convert Milligray (mGy) to Attogray (aGy) instantly. Free online radiation converter with formulas, tables and examples.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Attogray is 1e-18 gray units.
aGy = mGy × 1e+15
Results update instantly for Milligray to Attogray conversions.
Reserved above the conversion cards and below the converter.
Formula
1 Milligray = 1e+15 Attogray
aGy = mGy × 1e+15
mGy = aGy ÷ 1e+15
Conversion table
| 1 mGy | 1e+15 aGy |
| 2 mGy | 2e+15 aGy |
| 5 mGy | 5e+15 aGy |
| 10 mGy | 1e+16 aGy |
| 20 mGy | 2e+16 aGy |
| 50 mGy | 5e+16 aGy |
| 100 mGy | 1e+17 aGy |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many Attograys are in one Milligray?
One Milligray equals 1e+15 Attograys.
How do I convert Milligray to Attogray?
Multiply the number of Milligrays by 1e+15 to get Attograys. To go the other way, multiply Attograys by 1e-15 (or divide by 1e+15) to get Milligrays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Milligray and Attogray, so the result shown is mathematically precise (rounded only for display).
When is Milligray to Attogray conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
Milligray and Attogray are units used in the radiation family of measurements. Both units measure absorbed radiation dose (energy deposited per unit mass). This converter uses the precise relationship 1 Milligray = 1e+15 Attograys (equivalently 1 Attogray = 1e-15 Milligrays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.