☢️ Radioactivity Converter

Convert radioactivity (activity) units — becquerel, kilobecquerel, megabecquerel, gigabecquerel, curie, millicurie and microcurie. 1 curie = 3.7×10¹⁰ Bq.

From

1 Bq = 0.001 kBq

Precision

1 becquerels = 0.001 kilobecquerels

1 × 0.001 = 0.001

1 Bq equals 0.001 kBq, so multiplying by 0.001 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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All radioactivity units

Unit	Symbol	Definition
Becquerel	Bq	The SI unit of radioactivity — one nuclear decay (disintegration) per second. A very small unit: a banana is about 15 Bq, a human body around 4,000 Bq.
Kilobecquerel	kBq	One thousand becquerels (10³ Bq). A convenient scale for environmental and food-safety measurements.
Megabecquerel	MBq	One million becquerels (10⁶ Bq). Nuclear-medicine doses are usually given in megabecquerels — e.g. a few hundred MBq for a scan.
Gigabecquerel	GBq	One billion becquerels (10⁹ Bq). Used for stronger medical and industrial sources.
Curie	Ci	The traditional unit, defined as exactly 3.7×10¹⁰ Bq — originally the activity of one gram of radium-226. Still common in the US and in older literature.
Millicurie	mCi	One-thousandth of a curie (3.7×10⁷ Bq = 37 MBq). A typical unit for nuclear-medicine doses in countries using the curie.
Microcurie	µCi	One-millionth of a curie (3.7×10⁴ Bq = 37 kBq). Used for small check sources and laboratory quantities.
Rutherford	Rd	An old unit equal to 10⁶ decays per second (1 MBq). Largely obsolete but occasionally seen in historical texts.