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Half-Life of a Substance Calculator

Initial Size of at time =
<-- Half-Life
<-- Evaluate at time tn
  or  

How does the Half-Life of a Substance Calculator work?

Given a half-life (h) of a substance at time t, this determines the new substance size at time tn, otherwise known as decay.
This calculator has 4 inputs.

What 4 formulas are used for the Half-Life of a Substance Calculator?

  1. Δ = tn - t
  2. Number of half lives = Δ/half life
  3. Half Life Remaining = 1/2 * Prior Amount

For more math formulas, check out our Formula Dossier

What 5 concepts are covered in the Half-Life of a Substance Calculator?

decay
Reduction in size from decomposition
exponent
The power to raise a number
half-life
time required for a quantity to reduce to half its initial value
substance

Example calculations for the Half-Life of a Substance Calculator

  1. The half-life of a substance is 15. At the start, this substance has size 29. Calculate the size of the substance at time = 45
  2. The half-life of a substance is 12. At the start, this substance has size 33. Calculate the size of the substance at time = 60



Half-Life of a Substance Calculator Video