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Radioactivity Calculator

Isotope Half-life (T1/2)

Radioactive Decay
N=Noe-(0.693t/T½)
Initial activity (No)
Decay time (t)
Time units s m h d y
Disposal Limit (D.L.) (MBq/kg)
mass (m) kg
Final activity (N)
Timed Decay
t = -(T½/0.693) * ln(N/No)
Initial activity (No)
Final activity (N)
Decay time (t)
Timed Solid Disposal
t = -(T½/0.693) * ln(D.L./(No/m))
Initial activity (No) kBq
Disposal Limit (D.L.) kBq
mass (m) kg
Decay time (t)
Unit Converter
Activity 1 kBqMBqGBqµCimCi
Activity 2 kBqMBqGBqµCimCi
Find the Difference Between Two Dates
Date 1
Date 2
Days
Add or Subtract A Number of Days To A Date
Date 1
Days
Date 2