# Equipment Effectiveness (OEE) Calculator

> Measure how much of planned production time is truly productive.

Page: https://freecalculator.tech/tools/oee-calculator
Last reviewed: 2026-09-15

## Formula

Availability = Run time ÷ Planned production time; Performance = (Ideal cycle time × Total count) ÷ Run time; Quality = Good count ÷ Total count; OEE = Availability × Performance × Quality

- Availability = Run time ÷ Planned production time; Performance = (Ideal cycle time × Total count) ÷ Run time; Quality = Good count ÷ Total count; OEE = Availability × Performance × Quality.
- Inputs used: Planned production time, Run time, Ideal cycle time, Total units produced, Good units.
- Edge handling: Planned production time is required.; Planned production time must be greater than zero.; Planned production time must be no more than 10000000.; Run time is required.; Run time cannot be negative..

## Inputs

- Planned production time
- Run time
- Ideal cycle time
- Total units produced
- Good units

## Worked example: Eight-hour shift with 60 minutes of unplanned stops

800 units produced, 760 good, ideal cycle 0.5 minutes.
1. Start with Planned production time: 480, Run time: 420, Ideal cycle time: 0.5, Total units produced: 800, Good units: 760.
2. Apply the method: Availability = Run time ÷ Planned production time; Performance = (Ideal cycle time × Total count) ÷ Run time; Quality = Good count ÷ Total count; OEE = Availability × Performance × Quality.
3. 800 units produced, 760 good, ideal cycle 0.5 minutes.

## Common questions

### Where does this formula come from?

OEE as described in lean manufacturing guidance published by NIST MEP. See the source link on this page.

### What kind of calculation is this?

The product of availability, performance and quality, each measured from the shift's own records. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

A measure of equipment loss. It says nothing about demand, cost or profitability.

### How do I use the Equipment Effectiveness (OEE) Calculator?

Enter the required values for Planned production time, Run time, Ideal cycle time, Total units produced, Good units. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Equipment Effectiveness (OEE) Calculator use?

Availability = Run time ÷ Planned production time; Performance = (Ideal cycle time × Total count) ÷ Run time; Quality = Good count ÷ Total count; OEE = Availability × Performance × Quality The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### Can the Equipment Effectiveness (OEE) Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this equipment effectiveness (oee) calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- NIST MEP — https://www.nist.gov/blogs/manufacturing-innovation-blog/lean-manufacturing-basics

## Cite this page

- APA: Free Calculator. (2026, September 15). Equipment Effectiveness (OEE) Calculator. https://freecalculator.tech/tools/oee-calculator
- MLA: "Equipment Effectiveness (OEE) Calculator." Free Calculator, 15 Sept. 2026, https://freecalculator.tech/tools/oee-calculator.
- Link: Equipment Effectiveness (OEE) Calculator — Free Calculator, https://freecalculator.tech/tools/oee-calculator