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Units & converters

Radioactivity converter

Convert radioactive activity between becquerels and curies, including their prefixes.

Free & no registration Calculated in your browser
01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Converted value = original value × source factor / target factor

Worked example

1 Ci = 3.7e+10 Bq.

Things to check

  • One becquerel means one decay per second. Activity is different from dose. Calculating Sv from Bq requires a radiation and exposure model.
  • Rounding is applied only to displayed results. Very small or very large values may appear in scientific notation.

Sources and references