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