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Radioactivity unit converter

Convert becquerels and curies, including MBq, GBq, mCi and μCi. Scientific notation such as 3.7E10 is accepted.

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Converted activity

Bq to Ci: how the conversion works

1 Ci = 3.7 × 10¹⁰ Bq · 1 mCi = 37 MBq · 1 μCi = 37 kBq

One becquerel is one nuclear transformation per second. Divide an activity in Bq by 3.7 × 10¹⁰ to obtain Ci. For Ci to Bq, multiply by the same value. The unit dpm means transformations per minute; 1 Bq = 60 dpm.

Activity is distinct from absorbed dose (Gy), effective dose (Sv), and detector count rate (cps). A count-rate reading needs a measurement model and detection efficiency before it can be interpreted as activity.

Example: 370 MBq = 10 mCi. The unit relation is exact; displayed results are rounded to six significant figures.

Source: US NRC: becquerel and curie. Inputs are processed in your browser and are not submitted to a server.

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