Exponential growth & decay calculator
Evaluate A = A₀ e^{kt} for growth (k>0) or decay (k<0).
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Tool guide
Exponential growth & decay calculator: how it works
Practical information to understand the result and use this tool correctly.
About Exponential growth & decay calculator
The continuous model A(t)=A₀e^{kt} appears in finance, biology, and physics.
Sign of k selects growth versus decay.
For discrete compounding use (1+r)^t instead.
How to use it
- 1Enter A₀, k, and t.
- 2Calculate A(t).
- 3Read whether the model is growth or decay.
Frequently asked questions
- Half-life?
- k = −ln(2)/half-life for exponential decay.
- Units of k and t?
- Must match (e.g. per year and years).