Use the same time unit for half-life and time elapsed.
0 remaining
ā
Percent remaining
ā
Amount decayed
ā
Decay constant (Ī»)
ā
Mean lifetime (Ļ)
Frequently Asked Questions
What is half-life?
Half-life is the time it takes for a quantity to fall to half its value. After each half-life the remaining amount halves: N = Nā Ć (1/2)^(t / half-life).
Calculate the remaining quantity after radioactive (or other) decay using half-life.