Megagray is 1000000 gray units.
Megagray to Petagray
Convert Megagray (MGy) to Petagray (PGy) 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.
Petagray is 1000000000000000 gray units.
PGy = MGy × 1e-9
Results update instantly for Megagray to Petagray conversions.
Reserved above the conversion cards and below the converter.
Formula
1 Megagray = 1e-9 Petagray
PGy = MGy × 1e-9
MGy = PGy ÷ 1e-9
Conversion table
| 1 MGy | 1e-9 PGy |
| 2 MGy | 2e-9 PGy |
| 5 MGy | 5e-9 PGy |
| 10 MGy | 1e-8 PGy |
| 20 MGy | 2e-8 PGy |
| 50 MGy | 5e-8 PGy |
| 100 MGy | 1e-7 PGy |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many Petagrays are in one Megagray?
One Megagray equals 1e-9 Petagrays.
How do I convert Megagray to Petagray?
Multiply the number of Megagrays by 1e-9 to get Petagrays. To go the other way, multiply Petagrays by 1e+9 (or divide by 1e-9) to get Megagrays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Megagray and Petagray, so the result shown is mathematically precise (rounded only for display).
When is Megagray to Petagray 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
Megagray and Petagray 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 Megagray = 1e-9 Petagrays (equivalently 1 Petagray = 1e+9 Megagrays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.