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Radiation Activity Converter

Convert radioactivity between becquerel, curie, millicurie, microcurie, rutherford and metric prefixes of becquerel.

What this tool does

Convert radioactivity between becquerel, curie, millicurie, microcurie, rutherford and metric prefixes of becquerel. Type an amount in curies, choose the units, and the tool converts it to becquerels. It offers 8 radioactivity units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Becquerel, Kilobecquerel, Megabecquerel, Gigabecquerel, Curie, Millicurie, Microcurie, Rutherford. Starts as Curie.
  • To: Choose one of the same 8 units as "From". Starts as Becquerel.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from curies to becquerels:

  • 1 Ci = 37,000,000,000 Bq
  • 5 Ci = 185,000,000,000 Bq
  • 10 Ci = 370,000,000,000 Bq
  • 50 Ci = 1.85 × 10¹² Bq
  • 100 Ci = 3.7 × 10¹² Bq

Multiply the number of curies by 37,000,000,000 to get becquerels. Both units are exact definitions, so 37,000,000,000 is the exact factor: 1 Ci = 37,000,000,000 Bq.

Sources: Curie: NIST SP 811 (2008), Appendix B.8. Becquerel: SI Brochure, 9th edition (2019).

Limitations

  • Converts activity units only. It does not work out activity from half-life or the dose a source gives.

FAQs

Q: How many becquerels is one curie?
A: One curie is exactly 3.7 × 10¹⁰ becquerels (37 GBq).
Q: How many becquerels is one microcurie?
A: One microcurie is 37000 becquerels, or 37 kBq.

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