Microgray is 0.000001 gray units.
Micrograys to Femtograys Converter — uGy to fGy
Convert Microgray (uGy) to Femtogray (fGy) using the exact conversion factor (1 microgray = 1,000,000,000 femtogray). See the formula, worked examples, and conversion table.
Micrograys to Femtograys 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.
Femtogray is 1e-15 gray units.
Result = input x 1e-6 / 1e-15.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Micrograys to Femtograys
Microgray and Femtogray 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: Microgray is 0.000001 gray units, and femtogray is 1e-15 gray units.
Formula
femtograys = micrograys × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 microgray equals 0.000001 base units, and 1 femtogray equals 1e-15 base units, so dividing one by the other gives the direct microgray-to-femtogray factor of 1000000000.
Simple example
1 uGy × 1000000000 = 1,000,000,000 fGy
1 microgray = 1,000,000,000 femtograys.
Real-world example
10 uGy × 1000000000 = 10,000,000,000 fGy
10 micrograys = 10,000,000,000 femtograys.
Conversion table
| Microgray (uGy) | Femtogray (fGy) |
|---|---|
| 0.001 uGy | 1,000,000 fGy |
| 0.01 uGy | 10,000,000 fGy |
| 0.1 uGy | 100,000,000 fGy |
| 1 uGy | 1,000,000,000 fGy |
| 10 uGy | 10,000,000,000 fGy |
| 100 uGy | 100,000,000,000 fGy |
Reverse conversion: Femtogray to Microgray
1 fGy × 1e-9 = 1e-9 uGy
1 femtogray = 1e-9 micrograys.
micrograys = femtograys × 1e-9
For a page dedicated to this direction, see Femtogray to Microgray.
Understanding the Microgray (uGy)
Microgray is 0.000001 gray units.
Understanding the Femtogray (fGy)
Femtogray is 1e-15 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtograys are in 1 microgray?
1 microgray equals 1,000,000,000 femtograys, using the exact defined conversion factor rather than an estimate.
How do I convert microgray to femtogray?
Multiply the microgray value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert femtogray back to microgray?
Use the reverse factor: 1 femtogray equals 1e-9 micrograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgray?
Microgray (uGy) is a unit of radiation.
What is a femtogray?
Femtogray (fGy) is a unit of radiation.
Is the microgray to femtogray conversion exact?
Yes. Both microgray and femtogray 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.