Poisson Probability Calculator
Compute P(X=k) for a Poisson distribution.
Input Data
Input Rate λ.
Input Count k.
Results
0.146525
P(X=k) = e^(−λ) λ^k / k!.
At a glance:Poisson Probability Calculator: enter parameters to compute results; complements related calculators.
Formula
P(X=k) = e^(−λ) · λ^k / k!.
How to Use
- Enter rate λ and count k.
- It returns the point probability.
Case Studies
λ=4, k=2 → P≈0.14653
e^(−4)·16/2 ≈ 0.14653.
FAQ
When is Poisson appropriate?
Independent events at a constant average rate per interval, e.g. arrivals.
Related Tools
References
Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.