Calculator

MTBF Calculator

Calculate average operating time between repairable failures.

What this calculator tells you

Use total operating time and the number of failures in the same observation period.

Formula

MTBF = Total operating time ÷ Number of failures

Use consistent time periods and definitions. This result is a decision aid; validate source data and segment results by asset or work type where appropriate.

Total operating time

hours

Number of failures

Result

Enter values to calculate

Related resources

Knowledge•Reliability Engineering

MTBF

Mean time between failures (MTBF) is the average operating time between repairable asset failures. Learn a practical, repeatable approach your maintenance team can use.

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