Measurement & Standards
Radiological Unit Converter
Instant conversion between conventional US health physics units (Ci, R/hr, rem) and SI standards (Bq, Sv/h, Sv), with simultaneous readouts across every scale in the selected dimension.
Convert Values
1 Ci = 1,000 mCiStandard Health Physics Equivalents
Activity
1 Ci = 3.7 × 10¹⁰ Bq (37 GBq) 1 mCi = 37 MBq · 1 µCi = 37 kBq Dose Equivalent
1 Sv = 100 rem 1 mSv = 100 mrem · 10 µSv = 1 mrem Exposure in Air
1 R = 2.58 × 10⁻⁴ C/kg 1 R (gamma in tissue) ≈ 0.96 rad ≈ 1 rem Length & Shielding
1 in = 2.54 cm = 25.4 mm 1 ft = 30.48 cm · 1 m = 3.2808 ft Count Rate & Detection
1 cps = 60 cpm 1 kcpm = 1,000 cpm · 1 cpm ≈ 0.0167 cps Surface Contamination
1 Bq/cm² = 6,000 dpm/100 cm² 220 dpm/100 cm² (alpha limit) ≈ 0.037 Bq/cm² Neutron Flux & Cross Section
1 n/(cm²·s) = 10⁴ n/(m²·s) 1 barn = 10⁻²⁴ cm² = 1,000 mb Areal Density & Internal Dose
1 g/cm² = 1,000 mg/cm² = 10 kg/m² 1 Sv/Bq = 3.7 × 10⁶ rem/µCi All Equivalent Units in Category
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