Petagray is 1000000000000000 gray units.
Petagrays to Teragrays Converter — PGy to TGy
Convert Petagray (PGy) to Teragray (TGy) using the exact conversion factor (1 petagray = 1,000 teragray). See the formula, worked examples, and conversion table.
Petagrays to Teragrays 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.
Teragray is 1000000000000 gray units.
Result = input x 1e+15 / 1e+12.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Petagrays to Teragrays
Petagray and Teragray 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: Petagray is 1000000000000000 gray units, and teragray is 1000000000000 gray units.
Formula
teragrays = petagrays × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 petagray equals 1e+15 base units, and 1 teragray equals 1e+12 base units, so dividing one by the other gives the direct petagray-to-teragray factor of 1000.
Simple example
1 PGy × 1000 = 1,000 TGy
1 petagray = 1,000 teragrays.
Real-world example
10 PGy × 1000 = 10,000 TGy
10 petagrays = 10,000 teragrays.
Conversion table
| Petagray (PGy) | Teragray (TGy) |
|---|---|
| 0.001 PGy | 1 TGy |
| 0.01 PGy | 10 TGy |
| 0.1 PGy | 100 TGy |
| 1 PGy | 1,000 TGy |
| 10 PGy | 10,000 TGy |
| 100 PGy | 100,000 TGy |
Reverse conversion: Teragray to Petagray
1 TGy × 0.001 = 0.001 PGy
1 teragray = 0.001 petagrays.
petagrays = teragrays × 0.001
For a page dedicated to this direction, see Teragray to Petagray.
Understanding the Petagray (PGy)
Petagray is 1000000000000000 gray units.
Understanding the Teragray (TGy)
Teragray is 1000000000000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many teragrays are in 1 petagray?
1 petagray equals 1,000 teragrays, using the exact defined conversion factor rather than an estimate.
How do I convert petagray to teragray?
Multiply the petagray value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert teragray back to petagray?
Use the reverse factor: 1 teragray equals 0.001 petagrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a petagray?
Petagray (PGy) is a unit of radiation.
What is a teragray?
Teragray (TGy) is a unit of radiation.
Is the petagray to teragray conversion exact?
Yes. Both petagray and teragray 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.