ToolnozaINDUSTRIALMECHANICAL TOOL
Equipment Availability Calculator
Calculate equipment availability, operating hours, MTBF and MTTR from scheduled time, downtime and failure counts.
Equipment Availability Calculator
FREE ONLINE TOOLSTEP BY STEP
How to use equipment availability calculator
- Compare your result with the worked example.
- Check the assumptions and limitations.
WHEN IT HELPS
Common uses
- Evaluate a machine availability KPI with explicit time boundaries. Use one consistent reporting period for scheduled time and downtime.
Method and assumptions
Availability (%) = (scheduled − downtime)/scheduled × 100. MTBF = operating hours/failures. MTTR = downtime/failures, only when all downtime represents repair events.
Worked example
720 scheduled hours and 72 downtime hours give 648 available hours and 90% availability. With 600 actual running hours, 48 corrective repair hours and 6 failures, MTBF = 100 h and MTTR = 8 h.
Limitations
For valid MTTR, isolate corrective repair downtime; planned stops, waits and administrative delays require separate treatment. No failures means MTBF and MTTR are not determined.
Frequently asked question
Is mechanical availability the same as utilization?
No. Availability measures readiness over scheduled time; utilization measures how much available time is used productively.