Convert Curies to Nanobecquerels
Convert Curies (Ci) to Nanobecquerels (nBq) instantly and accurately.
Conversion Formula
nBq = Ci × 3.700000000e+19
About Curies
The curie (Ci) equals exactly 3.7 × 10¹⁰ Bq = 37 GBq, originally defined as the activity of 1 g of ²²⁶Ra. Still widely used in the US: ⁶⁰Co teletherapy sources are 5000-15000 Ci; ¹³⁷Cs blood irradiators are 1000-40000 Ci; NRC source licences for industrial radiography cite Ci limits. 1 Ci = 3.7 × 10¹⁰ Bq.
About Nanobecquerels
The nanobecquerel (nBq) equals 10⁻⁹ Bq. Atmospheric surveillance for tritium and ¹⁴C near nuclear facilities reports discharge rates in nBq/m³; EU drinking water directives set indicator activity concentrations for some radionuclides at the nBq/L level. 1 nBq = 10⁻⁹ Bq = 10⁻³ µBq.
Quick Reference Table
| Curies (Ci) | Nanobecquerels (nBq) |
|---|---|
| 1 Ci | 3.7 × 1019 nBq |
| 2 Ci | 7.4 × 1019 nBq |
| 5 Ci | 1.85 × 1020 nBq |
| 10 Ci | 3.7 × 1020 nBq |
| 25 Ci | 9.25 × 1020 nBq |
| 50 Ci | 1.85 × 1021 nBq |
| 100 Ci | 3.7 × 1021 nBq |