Exagray is 1000000000000000000 gray units.
Exagrays to Petagrays Converter — EGy to PGy
Convert Exagray (EGy) to Petagray (PGy) using the exact conversion factor (1 exagray = 1,000 petagray). See the formula, worked examples, and conversion table.
Exagrays to Petagrays converter
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.
Result = input x 1e+18 / 1e+15.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Exagrays to Petagrays
Exagray and Petagray both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Exagray is 1000000000000000000 gray units, and petagray is 1000000000000000 gray units.
Formula
petagrays = exagrays × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 exagray equals 1e+18 base units, and 1 petagray equals 1e+15 base units, so dividing one by the other gives the direct exagray-to-petagray factor of 1000.
Simple example
1 EGy × 1000 = 1,000 PGy
1 exagray = 1,000 petagrays.
Real-world example
10 EGy × 1000 = 10,000 PGy
10 exagrays = 10,000 petagrays.
Conversion table
| Exagray (EGy) | Petagray (PGy) |
|---|---|
| 0.001 EGy | 1 PGy |
| 0.01 EGy | 10 PGy |
| 0.1 EGy | 100 PGy |
| 1 EGy | 1,000 PGy |
| 10 EGy | 10,000 PGy |
| 100 EGy | 100,000 PGy |
Reverse conversion: Petagray to Exagray
1 PGy × 0.001 = 0.001 EGy
1 petagray = 0.001 exagrays.
exagrays = petagrays × 0.001
For a page dedicated to this direction, see Petagray to Exagray.
Understanding the Exagray (EGy)
Exagray is 1000000000000000000 gray units.
Understanding the Petagray (PGy)
Petagray is 1000000000000000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petagrays are in 1 exagray?
1 exagray equals 1,000 petagrays, using the exact defined conversion factor rather than an estimate.
How do I convert exagray to petagray?
Multiply the exagray value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert petagray back to exagray?
Use the reverse factor: 1 petagray equals 0.001 exagrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a exagray?
Exagray (EGy) is a unit of radiation.
What is a petagray?
Petagray (PGy) is a unit of radiation.
Is the exagray to petagray conversion exact?
Yes. Both exagray and petagray are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.