OEE Calculator
Measure how effectively a machine or line runs. Enter planned time, downtime, ideal cycle time, and unit counts to get OEE and its three components: availability, performance, and quality.
Example: with Planned production time 480 min · Downtime 60 min · Ideal cycle time 30 sec/unit · Total units produced 800 → OEE: 79.2%.
- Availability87.5%
- Performance95.2%
- Quality95.0%
Computed by the calculator below using its default values. Change any input to see your own numbers.
How you compare
📈 Track OEE with production software
Check it outThe three losses
OEE multiplies three rates: Availability (did the machine run when it was scheduled?), Performance (did it run at its ideal speed?), and Quality (were the parts good?). Because they multiply, a line at 90% on each scores only about 73% OEE — which is why world-class is often cited near 85%. Breaking the score into its parts shows where to focus: downtime, speed, or defects.
How it’s calculated
OEE = Availability × Performance × Quality, where availability = run ÷ planned time, performance = ideal output ÷ run time, quality = good ÷ total units.
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Common mistakes
- Comparing OEE without looking at the three components.
- Setting an ideal cycle time that is too slow.
Frequently asked questions
What's a good OEE?
85% is often cited as world-class for discrete manufacturing; 60% is typical. The components matter more than the headline number.
Why can performance exceed 100%?
Usually a sign the 'ideal' cycle time is set too slow. Update it to the true best-case to keep the metric meaningful.
What is planned production time?
Scheduled run time minus planned stops like breaks. Unplanned downtime is then subtracted to get actual run time.