How to convert millicuries to megabecquerels

To convert activity from mCi to MBq, multiply the value by the factor: 1 mCi = 37 MBq. Enter a number in the field above for an instant result.

The relation is exact: 1 curie (Ci) = 3.7·10¹⁰ becquerels (Bq) by definition. The becquerel is the SI unit — one decay per second; the curie is a non-SI unit, historically the activity of 1 g of radium-226.

Use it to convert source activities from certificates, datasheets and regulations. Need other units (mCi, GBq, dpm)? The full activity converter has them all.

Examples: 1 mCi = 37 MBq; 10 mCi = 370 MBq; 100 mCi = 3,700 MBq; 1,000 mCi = 37,000 MBq; 1,000,000 mCi = 37,000,000 MBq. Reverse: 1 MBq = 0.027027 mCi.