Convert Microcuries to Curies
Convert Microcuries (µCi) to Curies (Ci) instantly and accurately.
Conversion Formula
Ci = µCi × 1.000000000e-6
About Microcuries
The microcurie (µCi) equals 3.7 × 10⁴ Bq = 37 kBq. Sealed sources for educational and bench-top laboratory use are licensed up to 1-10 µCi under US NRC 10 CFR 30.18; small-animal PET imaging doses of ¹⁸F in preclinical research are expressed in µCi. 1 µCi = 3.7 × 10⁴ Bq.
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
| Microcuries (µCi) | Curies (Ci) |
|---|---|
| 1 µCi | 1 × 10-6 Ci |
| 2 µCi | 2 × 10-6 Ci |
| 5 µCi | 5 × 10-6 Ci |
| 10 µCi | 1 × 10-5 Ci |
| 25 µCi | 2.5 × 10-5 Ci |
| 50 µCi | 5 × 10-5 Ci |
| 100 µCi | 1 × 10-4 Ci |