OEE Calculator

Calculate Overall Equipment Effectiveness

Overall Equipment Effectiveness, or OEE, is the gold-standard measure of manufacturing productivity. It combines three factors into a single percentage: availability, the share of scheduled time the equipment is actually running; performance, how fast it runs relative to its maximum speed; and quality, the share of parts produced that meet specification. OEE is the product of the three, so availability of ninety percent, performance of ninety-five percent and quality of ninety-nine percent gives an OEE of about eighty-five percent.

Because the factors are multiplied, a weakness in any one pulls the whole score down.

Improving OEE

OEE shows how much of the truly productive manufacturing time is being used well, exposing the hidden losses from downtime, slow running and defects. An OEE of one hundred percent would mean producing only good parts, as fast as possible, with no stoppages. A score of eighty-five percent is widely regarded as world class, sixty percent as typical, and below forty percent as having significant room for improvement.

Breaking OEE into its three factors points directly to where losses occur: low availability suggests breakdowns and changeovers, low performance suggests minor stops and reduced speed, and low quality suggests defects and rework. All calculation happens locally in your browser.

Related tools

• Incident Impact Calculator — Estimate the cost of a security incident from severity, affected users and downtime hours, with a compliance and trust rating and the response actions each severity level demands.
• Third-Party Risk Assessor — Assess vendor risk based on data access and type.
• Data Breach Cost Estimator — Estimate what a data breach would cost from records exposed, cost per record, days to detect and hours of downtime, split into direct and indirect costs.
• SaaS Risk Heatmap — Pick the SaaS apps your company runs, add your own, and get a heatmap ranking each by data criticality times access scope, with the risk each carries.