Convert Femtograys to Grays
Convert Femtograys (fGy) to Grays (Gy) instantly and accurately.
Conversion Formula
Gy = fGy × 1.000000000e-15
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 Grays
The gray (Gy) is the SI coherent unit of absorbed radiation dose, defined as 1 joule of energy deposited per kilogram of matter. Named after Harold Gray (British radiobiologist, 1905-1965). Used globally in radiotherapy: curative tumour doses 40-80 Gy fractionated; total body irradiation before bone marrow transplant 12-14 Gy. 1 Gy = 1 J/kg = 100 rad.
Quick Reference Table
| Femtograys (fGy) | Grays (Gy) |
|---|---|
| 1 fGy | 1 × 10-15 Gy |
| 2 fGy | 2 × 10-15 Gy |
| 5 fGy | 5 × 10-15 Gy |
| 10 fGy | 1 × 10-14 Gy |
| 25 fGy | 2.5 × 10-14 Gy |
| 50 fGy | 5 × 10-14 Gy |
| 100 fGy | 1 × 10-13 Gy |