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Weibull Shape-Scale Reliability Calculator

R(t) = e^(−(t/η)^β) — survival function from Weibull params.

Calculates Weibull reliability R(t), failure probability, hazard rate, and MTTF from shape parameter β and scale parameter η at time t.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

R(t) = exp(−(t/η)^β); h(t) = (β/η)(t/η)^(β−1)

In depth

Calculates Weibull reliability R(t), failure probability, hazard rate, and MTTF from shape parameter β and scale parameter η at time t.