Convert Curies to Microcuries
Convert Curies (Ci) to Microcuries (µCi) instantly and accurately.
Conversion Formula
µCi = Ci × 1000000
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 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.
Quick Reference Table
| Curies (Ci) | Microcuries (µCi) |
|---|---|
| 1 Ci | 1000000 µCi |
| 2 Ci | 2000000 µCi |
| 5 Ci | 5000000 µCi |
| 10 Ci | 10000000 µCi |
| 25 Ci | 25000000 µCi |
| 50 Ci | 50000000 µCi |
| 100 Ci | 100000000 µCi |