Megagray is 1000000 gray units.
Megagrays to Teragrays Converter — MGy to TGy
Convert Megagray (MGy) to Teragray (TGy) using the exact conversion factor (1 megagray = 0.000001 teragray). See the formula, worked examples, and conversion table.
Megagrays 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+6 / 1e+12.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Megagrays to Teragrays
Megagray 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: Megagray is 1000000 gray units, and teragray is 1000000000000 gray units.
Formula
teragrays = megagrays × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 megagray equals 1000000 base units, and 1 teragray equals 1e+12 base units, so dividing one by the other gives the direct megagray-to-teragray factor of 0.000001.
Simple example
1 MGy × 0.000001 = 0.000001 TGy
1 megagray = 0.000001 teragrays.
Real-world example
10 MGy × 0.000001 = 0.00001 TGy
10 megagrays = 0.00001 teragrays.
Conversion table
| Megagray (MGy) | Teragray (TGy) |
|---|---|
| 0.001 MGy | 1e-9 TGy |
| 0.01 MGy | 1e-8 TGy |
| 0.1 MGy | 1e-7 TGy |
| 1 MGy | 0.000001 TGy |
| 10 MGy | 0.00001 TGy |
| 100 MGy | 0.0001 TGy |
Reverse conversion: Teragray to Megagray
0.000001 TGy × 1000000 = 1 MGy
0.000001 teragrays = 1 megagray.
megagrays = teragrays × 1000000
For a page dedicated to this direction, see Teragray to Megagray.
Understanding the Megagray (MGy)
Megagray is 1000000 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 megagray?
1 megagray equals 0.000001 teragrays, using the exact defined conversion factor rather than an estimate.
How do I convert megagray to teragray?
Multiply the megagray value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert teragray back to megagray?
Use the reverse factor: 1 teragray equals 1,000,000 megagrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a megagray?
Megagray (MGy) is a unit of radiation.
What is a teragray?
Teragray (TGy) is a unit of radiation.
Is the megagray to teragray conversion exact?
Yes. Both megagray and teragray are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 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.