Teragray is 1000000000000 gray units.
Teragrays to Gigagrays Converter — TGy to GGy
Convert Teragray (TGy) to Gigagray (GGy) using the exact conversion factor (1 teragray = 1,000 gigagray). See the formula, worked examples, and conversion table.
Teragrays to Gigagrays 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.
Gigagray is 1000000000 gray units.
Result = input x 1e+12 / 1e+9.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Teragrays to Gigagrays
Teragray and Gigagray 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: Teragray is 1000000000000 gray units, and gigagray is 1000000000 gray units.
Formula
gigagrays = teragrays × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 teragray equals 1e+12 base units, and 1 gigagray equals 1000000000 base units, so dividing one by the other gives the direct teragray-to-gigagray factor of 1000.
Simple example
1 TGy × 1000 = 1,000 GGy
1 teragray = 1,000 gigagrays.
Real-world example
10 TGy × 1000 = 10,000 GGy
10 teragrays = 10,000 gigagrays.
Conversion table
| Teragray (TGy) | Gigagray (GGy) |
|---|---|
| 0.001 TGy | 1 GGy |
| 0.01 TGy | 10 GGy |
| 0.1 TGy | 100 GGy |
| 1 TGy | 1,000 GGy |
| 10 TGy | 10,000 GGy |
| 100 TGy | 100,000 GGy |
Reverse conversion: Gigagray to Teragray
1 GGy × 0.001 = 0.001 TGy
1 gigagray = 0.001 teragrays.
teragrays = gigagrays × 0.001
For a page dedicated to this direction, see Gigagray to Teragray.
Understanding the Teragray (TGy)
Teragray is 1000000000000 gray units.
Understanding the Gigagray (GGy)
Gigagray is 1000000000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigagrays are in 1 teragray?
1 teragray equals 1,000 gigagrays, using the exact defined conversion factor rather than an estimate.
How do I convert teragray to gigagray?
Multiply the teragray value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert gigagray back to teragray?
Use the reverse factor: 1 gigagray equals 0.001 teragrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a teragray?
Teragray (TGy) is a unit of radiation.
What is a gigagray?
Gigagray (GGy) is a unit of radiation.
Is the teragray to gigagray conversion exact?
Yes. Both teragray and gigagray 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.