Convert Rems to Femtosieverts
Convert Rems (rem) to Femtosieverts (fSv) instantly and accurately.
Conversion Formula
fSv = rem × 10000000000000
About Rems
The rem (roentgen equivalent man) equals exactly 0.01 Sv = 1 cSv. The pre-SI unit of equivalent dose, still dominant in US regulation: NRC occupational whole-body limit 5 rem/year; 10 CFR Part 20 exposure limits cited in rem; US military personnel dose records maintained in rem. 1 rem = 0.01 Sv = 1 cSv.
About Femtosieverts
The femtosievert (fSv) equals 10⁻¹⁵ Sv. Used in computational nanodosimetry and Monte Carlo particle-transport simulations to characterise the equivalent dose from a single ion traversal through a DNA segment or cell organelle. Ultra-sensitive detector calibration in deep underground laboratories approaches the fSv level. 1 fSv = 10⁻¹⁵ Sv = 10⁻³ pSv.
Quick Reference Table
| Rems (rem) | Femtosieverts (fSv) |
|---|---|
| 1 rem | 1 × 1013 fSv |
| 2 rem | 2 × 1013 fSv |
| 5 rem | 5 × 1013 fSv |
| 10 rem | 1 × 1014 fSv |
| 25 rem | 2.5 × 1014 fSv |
| 50 rem | 5 × 1014 fSv |
| 100 rem | 1 × 1015 fSv |