Convert Rads to Femtograys
Convert Rads (rad) to Femtograys (fGy) instantly and accurately.
Conversion Formula
fGy = rad × 10000000000000
About Rads
The rad (rad) equals exactly 0.01 Gy = 100 erg/g. The pre-SI unit of absorbed dose, defined by the ICRU in 1953, still widely used in the US in radiation therapy (cGy = rad numerically), radiation biology, and NRC regulations. Whole-body 50% lethal dose (LD50) for humans ~350-450 rad. 1 rad = 0.01 Gy = 1 cGy.
About Femtograys
The femtogray (fGy) equals 10⁻¹⁵ Gy, used in radiation biology to characterise the dose deposited by a single low-energy Auger electron cascade or a single traversal of a low-LET particle through a cell nucleus. Monte Carlo microdosimetry simulations of targeted radionuclide therapy report subcellular doses at the fGy level. 1 fGy = 10⁻¹⁵ Gy = 10⁻³ pGy.
Quick Reference Table
| Rads (rad) | Femtograys (fGy) |
|---|---|
| 1 rad | 1 × 1013 fGy |
| 2 rad | 2 × 1013 fGy |
| 5 rad | 5 × 1013 fGy |
| 10 rad | 1 × 1014 fGy |
| 25 rad | 2.5 × 1014 fGy |
| 50 rad | 5 × 1014 fGy |
| 100 rad | 1 × 1015 fGy |