OEE Calculator

Availability × Performance × Quality · Six Big Losses · benchmarks

Time Unit

Time

Planned Production Time

Operating Time (downtime subtracted)

Planned Production Time = total time the equipment is scheduled to run, after you exclude whatever your plant counts as non-production (breaks, meetings, planned maintenance) — you define that exclusion.

Production

Ideal Cycle Time (per unit)

Total Count

Good Count

Enter Availability, Performance and Quality (%) for each machine or shift — the weakest OEE is flagged.

Set a target OEE and two known factors — the tool solves for the third factor you need.

Target OEE (%)

Solve for

Availability (%)

Performance (%)

Quality (%)

Result

Enter your time and production data to get Availability, Performance, Quality and OEE, a Six Big Losses breakdown showing where effectiveness is lost, and how you compare to world-class benchmarks

OEE multiplies three rates, so a modest drop in each compounds — 90% × 90% × 90% is only 73%. Performance can appear above 100% if the actual cycle beat the ideal (usually a sign the ideal cycle time is set too slow, or of a counting error) — treat that as a flag to review your ideal cycle time. The Six Big Losses split here is derived from your headline inputs; a full loss analysis needs categorised downtime and reject logging from the line. Benchmark bands are widely cited conventions, not universal targets — a realistic target depends on your industry, equipment age and process. Use this for tracking and improvement, alongside proper shop-floor data collection.