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