Rontogray is 1e-27 gray units.
Rontograys to Yoctograys Converter — rGy to yGy
Convert Rontogray (rGy) to Yoctogray (yGy) using the exact conversion factor (1 rontogray = 0.001 yoctogray). See the formula, worked examples, and conversion table.
Rontograys to Yoctograys 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.
Yoctogray is 1e-24 gray units.
Result = input x 1e-27 / 1e-24.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Rontograys to Yoctograys
Rontogray and Yoctogray 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: Rontogray is 1e-27 gray units, and yoctogray is 1e-24 gray units.
Formula
yoctograys = rontograys × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 rontogray equals 1e-27 base units, and 1 yoctogray equals 1e-24 base units, so dividing one by the other gives the direct rontogray-to-yoctogray factor of 0.001.
Simple example
1 rGy × 0.001 = 0.001 yGy
1 rontogray = 0.001 yoctograys.
Real-world example
10 rGy × 0.001 = 0.01 yGy
10 rontograys = 0.01 yoctograys.
Conversion table
| Rontogray (rGy) | Yoctogray (yGy) |
|---|---|
| 0.001 rGy | 0.000001 yGy |
| 0.01 rGy | 0.00001 yGy |
| 0.1 rGy | 0.0001 yGy |
| 1 rGy | 0.001 yGy |
| 10 rGy | 0.01 yGy |
| 100 rGy | 0.1 yGy |
Reverse conversion: Yoctogray to Rontogray
0.001 yGy × 1000 = 1 rGy
0.001 yoctograys = 1 rontograys.
rontograys = yoctograys × 1000
For a page dedicated to this direction, see Yoctogray to Rontogray.
Understanding the Rontogray (rGy)
Rontogray is 1e-27 gray units.
Understanding the Yoctogray (yGy)
Yoctogray is 1e-24 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctograys are in 1 rontogray?
1 rontogray equals 0.001 yoctograys, using the exact defined conversion factor rather than an estimate.
How do I convert rontogray to yoctogray?
Multiply the rontogray value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert yoctogray back to rontogray?
Use the reverse factor: 1 yoctogray equals 1,000 rontograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a rontogray?
Rontogray (rGy) is a unit of radiation.
What is a yoctogray?
Yoctogray (yGy) is a unit of radiation.
Is the rontogray to yoctogray conversion exact?
Yes. Both rontogray and yoctogray 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.