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# Half Life Calculator

The Half-Life Time is the amount of time taken by the half of the substance or quantity to reduce half of its substance under a specified process. It is used in the nuclear physics to undergo the stability of the atoms, that is radioactive decay. Use our online radioactive decay calculator to calculate the Half-Lifetime of a substance. Enter the values of total time, initial and remaining quantity in the half life calculator to understand decay process.

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The Half-Life Time is the amount of time taken by the half of the substance or quantity to reduce half of its substance under a specified process. It is used in the nuclear physics to undergo the stability of the atoms, that is radioactive decay. Use our online radioactive decay calculator to calculate the Half-Lifetime of a substance. Enter the values of total time, initial and remaining quantity in the half life calculator to understand decay process.

#### Formula:

t1/2 = t × ( ln (2) / ln (nt/no)) Where, t1/2 = Half Life Time t = Total Time nt= Remaining Quantity no = Initial Quantity

The half life time is widely used by the Archeologists and geologists during the process of carbon dating.

### Example:

Calculate the half lifetime of radioactivity Cobalt 57 isotope whose initial activity is 6.8, final activity is 6.78 and the decay time is 0.86ns ?

#### Solution:

Solution: t1/2 = 0.86 × ( ln (2) / ln (6.78/6.8))
= 202.378ns