Radioactive Activity Converter

Convert between all radioactive activity units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: becquerel (Bq)

Conversion Formula

About Radioactive Activity Units

Common Radioactive Activity Conversions

• 1 Ci = 3.7 × 10¹⁰ Bq (exact, BIPM 1975 definition)
• 1 Rd = 10⁶ Bq = 1 MBq (exact, rutherford, Montreal Conference 1946)
• 1 dpm = 1/60 Bq ≈ 16.667 mBq (exact - used in liquid scintillation counting)
• 1 mCi = 37 MBq = 3.7 × 10⁷ Bq (US clinical nuclear medicine standard)
• 1 kBq = 10³ Bq  |  1 MBq = 10⁶ Bq  |  1 GBq = 10⁹ Bq  |  1 TBq = 10¹² Bq
• ¹⁸F-FDG PET dose: 370 MBq = 10 mCi  |  ^99mTc bone scan: 740 MBq = 20 mCi

Direct Converters