Picogray is 1e-12 gray units.
Picograys to Nanograys Converter — pGy to nGy
Convert Picogray (pGy) to Nanogray (nGy) using the exact conversion factor (1 picogray = 0.001 nanogray). See the formula, worked examples, and conversion table.
Picograys to Nanograys 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.
Nanogray is 1e-9 gray units.
Result = input x 1e-12 / 1e-9.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Picograys to Nanograys
Picogray and Nanogray 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: Picogray is 1e-12 gray units, and nanogray is 1e-9 gray units.
Formula
nanograys = picograys × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 picogray equals 1e-12 base units, and 1 nanogray equals 1e-9 base units, so dividing one by the other gives the direct picogray-to-nanogray factor of 0.001.
Simple example
1 pGy × 0.001 = 0.001 nGy
1 picogray = 0.001 nanograys.
Real-world example
10 pGy × 0.001 = 0.01 nGy
10 picograys = 0.01 nanograys.
Conversion table
| Picogray (pGy) | Nanogray (nGy) |
|---|---|
| 0.001 pGy | 0.000001 nGy |
| 0.01 pGy | 0.00001 nGy |
| 0.1 pGy | 0.0001 nGy |
| 1 pGy | 0.001 nGy |
| 10 pGy | 0.01 nGy |
| 100 pGy | 0.1 nGy |
Reverse conversion: Nanogray to Picogray
0.001 nGy × 1000 = 1 pGy
0.001 nanograys = 1 picograys.
picograys = nanograys × 1000
For a page dedicated to this direction, see Nanogray to Picogray.
Understanding the Picogray (pGy)
Picogray is 1e-12 gray units.
Understanding the Nanogray (nGy)
Nanogray is 1e-9 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanograys are in 1 picogray?
1 picogray equals 0.001 nanograys, using the exact defined conversion factor rather than an estimate.
How do I convert picogray to nanogray?
Multiply the picogray value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert nanogray back to picogray?
Use the reverse factor: 1 nanogray equals 1,000 picograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a picogray?
Picogray (pGy) is a unit of radiation.
What is a nanogray?
Nanogray (nGy) is a unit of radiation.
Is the picogray to nanogray conversion exact?
Yes. Both picogray and nanogray are defined by fixed standards rather than physical artifacts, so the factor of 0.001 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.