Becquerel to Curie Converter — Radioactivity

Convert activity between becquerels, kilo/mega/gigabecquerels, curies, millicuries, and dpm.

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How this conversion works. Activity is converted through the becquerel (one decay per second); the curie relation (3.7×10¹⁰ Bq exactly) follows US NRC — Measuring Radiation. Unit conversion only — this does not assess dose, risk, or safety, and is not medical advice.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert millicurie to megabecquerel?

1 millicurie = 37 megabecquerel. Choose "Millicurie (mCi)" as From and "Megabecquerel (MBq)" as To, type a value, and the result updates instantly.

How many MBq is 1 mCi?

37 MBq exactly — the curie is defined as 3.7 × 10¹⁰ decays per second. Nuclear-medicine doses like 10 mCi of Tc-99m are 370 MBq.

Why is radon reported in pCi/L?

US radon guidance uses picocuries per liter; the EPA action level of 4 pCi/L equals 148 Bq/m³. The pCi→Bq factor (0.037) converts the activity part.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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