Half-Life Calculator Solves for Beginning Amount, Ending
Amount, Elapsed Time or Half-Life.
Radioactive Decay Calculator Displays activity
in 10 increments between 2 time periods. Each of the 10 increments calculates , the
absolute activity, the activity factor and the number of
half-lives that have elapsed.
It has a menu of 70 isotopes and allows you to input half-life values not on the list.