# Half Life Calculator

The half-life calculator is a free online tool used to calculate the half-life in exponential decay. BYJU’S half-life calculator tool is easy to access. Enter the input values such as initial quantity No, the quantity remains N(t) and time (t) to get the half-life (t1/2) in the output field.

Half-life defines the time taken for the substance that undergoes the decaying process to reduce by half. It describes the quantities encountering exponential decay wherever the half-life is consistent over the complete period of the decay. It is a particular unit for the exponential decay equation. But, a half-life can also be determined for non-exponential decay processes, though the half-life differs completely in the decay process.

The word “half-life” is most generally used with atoms encountering the radioactive decay but can be used to interpret different kinds of decay, whether exponential or not. One of the most recognized uses of half-life is carbon-14 dating. The half-life of carbon-14 is about 5,730 years, and it can be surely used to estimate dates up to approximately 50,000 years ago.

### Half-life Calculation Formula in an Exponential Decay

The following formula can calculate the exponential decay process:

N(t) = N0 (1/2)t/t1/2

Where

N(t) = the quantity still remains and has not decayed yet after time “t.”

N0 = the initial quantity of the substance.

t1/2 = the half-life of the decaying quantity.