Convert Femtobecquerels per kilogram to Millicuries per kilogram
Convert Femtobecquerels per kilogram (fBq/kg) to Millicuries per kilogram (mCi/kg) instantly and accurately.
Conversion Formula
mCi/kg = fBq/kg × 2.702702703e-23
About Femtobecquerels per kilogram
The femtobecquerel per kilogram (fBq/kg) equals 10⁻¹⁵ Bq/kg. Used in accelerator mass spectrometry (AMS) to quantify cosmogenic radionuclide concentrations (¹⁰Be, ³⁶Cl) in ice cores, sediments, and geological minerals where activities per unit mass are at the femto-level. Ultra-clean radiochemistry purity assessments for solar neutrino detectors also reach fBq/kg sensitivities. 1 fBq/kg = 10⁻¹⁵ Bq/kg.
About Millicuries per kilogram
The millicurie per kilogram (mCi/kg) equals 3.7 × 10⁷ Bq/kg = 37 MBq/kg. Radiopharmaceutical preparations are sometimes characterised in mCi/kg when assessing organ uptake per body mass; ⁹⁹mTc-labelled compounds have specific activities in the mCi/µmol range that translate to high mCi/kg values. 1 mCi/kg = 3.7 × 10⁷ Bq/kg.
Quick Reference Table
| Femtobecquerels per kilogram (fBq/kg) | Millicuries per kilogram (mCi/kg) |
|---|---|
| 1 fBq/kg | 2.703 × 10-23 mCi/kg |
| 2 fBq/kg | 5.405 × 10-23 mCi/kg |
| 5 fBq/kg | 1.351 × 10-22 mCi/kg |
| 10 fBq/kg | 2.703 × 10-22 mCi/kg |
| 25 fBq/kg | 6.757 × 10-22 mCi/kg |
| 50 fBq/kg | 1.351 × 10-21 mCi/kg |
| 100 fBq/kg | 2.703 × 10-21 mCi/kg |