Attogray is 1e-18 gray units.
Attograys to Zeptograys Converter — aGy to zGy
Convert Attogray (aGy) to Zeptogray (zGy) using the exact conversion factor (1 attogray = 1,000 zeptogray). See the formula, worked examples, and conversion table.
Attograys to Zeptograys 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.
Zeptogray is 1e-21 gray units.
Result = input x 1e-18 / 1e-21.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attograys to Zeptograys
Attogray and Zeptogray 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: Attogray is 1e-18 gray units, and zeptogray is 1e-21 gray units.
Formula
zeptograys = attograys × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 attogray equals 1e-18 base units, and 1 zeptogray equals 1e-21 base units, so dividing one by the other gives the direct attogray-to-zeptogray factor of 1000.
Simple example
1 aGy × 1000 = 1,000 zGy
1 attogray = 1,000 zeptograys.
Real-world example
10 aGy × 1000 = 10,000 zGy
10 attograys = 10,000 zeptograys.
Conversion table
| Attogray (aGy) | Zeptogray (zGy) |
|---|---|
| 0.001 aGy | 1 zGy |
| 0.01 aGy | 10 zGy |
| 0.1 aGy | 100 zGy |
| 1 aGy | 1,000 zGy |
| 10 aGy | 10,000 zGy |
| 100 aGy | 100,000 zGy |
Reverse conversion: Zeptogray to Attogray
1 zGy × 0.001 = 0.001 aGy
1 zeptogray = 0.001 attograys.
attograys = zeptograys × 0.001
For a page dedicated to this direction, see Zeptogray to Attogray.
Understanding the Attogray (aGy)
Attogray is 1e-18 gray units.
Understanding the Zeptogray (zGy)
Zeptogray is 1e-21 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptograys are in 1 attogray?
1 attogray equals 1,000 zeptograys, using the exact defined conversion factor rather than an estimate.
How do I convert attogray to zeptogray?
Multiply the attogray value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert zeptogray back to attogray?
Use the reverse factor: 1 zeptogray equals 0.001 attograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a attogray?
Attogray (aGy) is a unit of radiation.
What is a zeptogray?
Zeptogray (zGy) is a unit of radiation.
Is the attogray to zeptogray conversion exact?
Yes. Both attogray and zeptogray 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.