Convert Femtograys to Rads
Convert Femtograys (fGy) to Rads (rad) instantly and accurately.
Conversion Formula
rad = fGy × 1.000000000e-13
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.
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.
Quick Reference Table
| Femtograys (fGy) | Rads (rad) |
|---|---|
| 1 fGy | 1 × 10-13 rad |
| 2 fGy | 2 × 10-13 rad |
| 5 fGy | 5 × 10-13 rad |
| 10 fGy | 1 × 10-12 rad |
| 25 fGy | 2.5 × 10-12 rad |
| 50 fGy | 5 × 10-12 rad |
| 100 fGy | 1 × 10-11 rad |