Reliability Toolkit
FIT Rate & HTOL Confidence Calculator
Translate HTOL exposure into use-equivalent device-hours and a confidence-bounded failure-rate estimate.
Engineering inputs
Results
Your calculation
Enter the inputs and select Calculate.
Poisson events, a constant use-condition failure rate, actual accumulated device-hours including early failure times, independent units, and a justified acceleration factor. Zero failures does not prove zero FIT.
Model notes
Poisson events, a constant use-condition failure rate, actual accumulated device-hours including early failure times, independent units, and a justified acceleration factor. Zero failures does not prove zero FIT.
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