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THE FEUTEX TOOLKIT

Weibull Lifetime Profile

Evaluate Weibull survival, failure probability, instantaneous hazard and median lifetime.

Probability workspace● Runs in your browser
01 Your input
02 Your result
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FormulaCdf = -expm1(-((t/scale)**shape)); Survival = exp(-((t/scale)**shape)); Hazard = shape/scale*(t/scale)**(shape-1); Median = scale*log(2)**(1/shape)
Sources and model references

Worked example

Inputs

Shape
2 number
Scale
10 time
Time
5 time

Expected results

Cdf
0.2211992169 probability
Survival
0.7788007831 probability
Hazard
0.1 1/time
Median
8.325546112 time

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter the labeled inputs using consistent units.
  2. Check the stated assumptions and calculate.
  3. Review each output and compare another input scenario.

Try this example

{
  "shape": 2,
  "scale": 10,
  "t": 5
}

Accuracy and scope

Finite floating-point arithmetic; results can lose precision near singular or extreme inputs.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.