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. Pick the unit you are converting from, such as Terabecquerel (TBq) or Gigabecquerel (GBq).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Disintegrations per second (dps) included.

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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