Nanogray is 1e-9 gray units.
Nanograys to Attograys Converter — nGy to aGy
Convert Nanogray (nGy) to Attogray (aGy) using the exact conversion factor (1 nanogray = 1,000,000,000 attogray). See the formula, worked examples, and conversion table.
Nanograys 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-9 / 1e-18.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanograys to Attograys
Nanogray 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: Nanogray is 1e-9 gray units, and attogray is 1e-18 gray units.
Formula
attograys = nanograys × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 nanogray equals 1e-9 base units, and 1 attogray equals 1e-18 base units, so dividing one by the other gives the direct nanogray-to-attogray factor of 1000000000.
Simple example
1 nGy × 1000000000 = 1,000,000,000 aGy
1 nanogray = 1,000,000,000 attograys.
Real-world example
10 nGy × 1000000000 = 10,000,000,000 aGy
10 nanograys = 10,000,000,000 attograys.
Conversion table
| Nanogray (nGy) | Attogray (aGy) |
|---|---|
| 0.001 nGy | 1,000,000 aGy |
| 0.01 nGy | 10,000,000 aGy |
| 0.1 nGy | 100,000,000 aGy |
| 1 nGy | 1,000,000,000 aGy |
| 10 nGy | 10,000,000,000 aGy |
| 100 nGy | 100,000,000,000 aGy |
Reverse conversion: Attogray to Nanogray
1 aGy × 1e-9 = 1e-9 nGy
1 attogray = 1e-9 nanograys.
nanograys = attograys × 1e-9
For a page dedicated to this direction, see Attogray to Nanogray.
Understanding the Nanogray (nGy)
Nanogray is 1e-9 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 nanogray?
1 nanogray equals 1,000,000,000 attograys, using the exact defined conversion factor rather than an estimate.
How do I convert nanogray to attogray?
Multiply the nanogray value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert attogray back to nanogray?
Use the reverse factor: 1 attogray equals 1e-9 nanograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanogray?
Nanogray (nGy) is a unit of radiation.
What is a attogray?
Attogray (aGy) is a unit of radiation.
Is the nanogray to attogray conversion exact?
Yes. Both nanogray and attogray are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.