How do you calculate MTTR and MTBF?
MTTR measures the average time needed to restore service. MTBF measures the average operating time between failures.
Formulas: MTTR = total repair time ÷ failures. MTBF = total operating time ÷ failures. Estimated availability = MTBF ÷ (MTBF + MTTR) × 100.
Example: 12 hours of repair time, 2,000 operating hours and 4 failures produce an MTTR of 3 hours and an MTBF of 500 hours.
Convert an availability target into allowed downtime with the SLA Calculator.
Inputs are processed in your browser and are not sent to our server.