How does the Half-Life Calculator work?

Calculate remaining amount after radioactive or exponential decay. The tool calculates an estimate from the values entered.

Can I copy the result?

Yes. Use the Copy Result button to copy the current results.

Scientific

Calculate remaining amount after radioactive or exponential decay.

Initial Amount

Half-life

Elapsed Time

Primary Result -

Secondary Result -

Additional Result -

Formula

Remaining = initial * (1/2)^(time / half-life)

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