Convert Nanocuries to Curies
Convert Nanocuries (nCi) to Curies (Ci) instantly and accurately.
Conversion Formula
Ci = nCi × 1.000000000e-9
About Nanocuries
The nanocurie (nCi) equals 37 Bq. Sealed radioactive sources in laboratory instruments (electron-capture detectors in GC, ionisation chambers) are licensed in nCi; nCi is the working unit on US NRC licence forms and instrument calibration certificates for low-level sources. 1 nCi = 37 Bq = 3.7 × 10⁻⁸ Ci.
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.
Quick Reference Table
| Nanocuries (nCi) | Curies (Ci) |
|---|---|
| 1 nCi | 1 × 10-9 Ci |
| 2 nCi | 2 × 10-9 Ci |
| 5 nCi | 5 × 10-9 Ci |
| 10 nCi | 1 × 10-8 Ci |
| 25 nCi | 2.5 × 10-8 Ci |
| 50 nCi | 5 × 10-8 Ci |
| 100 nCi | 1 × 10-7 Ci |