Exagray is 1000000000000000000 gray units.
Exagrays to Yottagrays Converter — EGy to YGy
Convert Exagray (EGy) to Yottagray (YGy) using the exact conversion factor (1 exagray = 0.000001 yottagray). See the formula, worked examples, and conversion table.
Exagrays to Yottagrays 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.
Yottagray is 1e+24 gray units.
Result = input x 1e+18 / 1e+24.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Exagrays to Yottagrays
Exagray and Yottagray 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 yottagray is 1e+24 gray units.
Formula
yottagrays = exagrays × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 exagray equals 1e+18 base units, and 1 yottagray equals 1e+24 base units, so dividing one by the other gives the direct exagray-to-yottagray factor of 0.000001.
Simple example
1 EGy × 0.000001 = 0.000001 YGy
1 exagray = 0.000001 yottagrays.
Real-world example
10 EGy × 0.000001 = 0.00001 YGy
10 exagrays = 0.00001 yottagrays.
Conversion table
| Exagray (EGy) | Yottagray (YGy) |
|---|---|
| 0.001 EGy | 1e-9 YGy |
| 0.01 EGy | 1e-8 YGy |
| 0.1 EGy | 1e-7 YGy |
| 1 EGy | 0.000001 YGy |
| 10 EGy | 0.00001 YGy |
| 100 EGy | 0.0001 YGy |
Reverse conversion: Yottagray to Exagray
0.000001 YGy × 1000000 = 1 EGy
0.000001 yottagrays = 1 exagray.
exagrays = yottagrays × 1000000
For a page dedicated to this direction, see Yottagray to Exagray.
Understanding the Exagray (EGy)
Exagray is 1000000000000000000 gray units.
Understanding the Yottagray (YGy)
Yottagray is 1e+24 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yottagrays are in 1 exagray?
1 exagray equals 0.000001 yottagrays, using the exact defined conversion factor rather than an estimate.
How do I convert exagray to yottagray?
Multiply the exagray value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert yottagray back to exagray?
Use the reverse factor: 1 yottagray equals 1,000,000 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 yottagray?
Yottagray (YGy) is a unit of radiation.
Is the exagray to yottagray conversion exact?
Yes. Both exagray and yottagray 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.