Utilnaro
Category: Converters

Radioactivity Converter

Convert becquerels, curies and their multiples.

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Converting Radioactivity.

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You can type here too — it converts the other way.

1 Bq = 2.7027e-11 Ci

Exact by definition

The same value in other units

megabecquerel
1e-6 MBq
Settings

Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.

Convert a whole list

Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.

Details

About this tool

Converts between becquerels - one decay per second - and curies, plus the kilo, mega and giga multiples used in laboratory and medical sources.

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Good to know

Questions people actually ask

Why is a curie such a large number of becquerels?
Because it was defined as the activity of one gram of radium: 3.7 × 10¹⁰ decays per second. A becquerel is a single decay per second, so everyday sources are quoted in kBq or MBq.