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SYMESTIC OEE CALCULATOR

OEE Calculator

Use this OEE calculator to measure Availability, Performance and Quality – and see instantly what hidden losses are costing your production.

Guide FAQ
Calculation mode
TEEP additionally accounts for the utilization of your calendar time.
1
Time data
Shift and downtime data – the basis for Availability.
Total shift time
min
e.g. 480 = 8 hours
Planned downtime
min
!
Breaks, shift changes, planned maintenance
=Planned production time 420min
Unplanned downtime
min
!
Breakdowns, changeovers, missing material
=Operating time 345min
Calendar time
min
!
1440 = 24 h (1 day) – same basis as the shift above
2
Production & Quality
Part counts and cycle time – the basis for Performance and Quality.
Ideal cycle time
!
Theoretically fastest time per unit
Total parts produced
pcs
Good parts + scrap + rework
Scrap
pcs
!
Rework
pcs
=Good parts 550pcs
=Theoretically possible parts 690pcs
3
Economics (optional)
Add the margin per unit to see your loss in €.
Contribution margin per unit
EUR
Margin / lost profit per good part
Currency
Shifts per day
Production days / year
4
Context (optional)
Select your industry for the benchmark comparison.
Industry
OEE Target 85 %
Rating

TEEP
Utilization
! Performance above 100 % – please check the cycle time, part count or operating time. The ideal cycle time is probably set too optimistically.
Availability
Target 90 %
Performance
Target 95 %
Quality
Target 99.9 %
Where your time is lost
Breakdown of planned production time into effective production and losses.
Total loss
0 % of planned production time 100 %
Effective production (OEE)
Availability loss
Performance loss
Quality loss
Possible good parts at 100 %:
Lost good parts / shift
Potential per shift
Additional potential per year
Potential by cause (per shift)
Availability
Performance
Quality
€
Hidden Factory – your €-potential
Enter a contribution margin per unit on the left to calculate your hidden potential in euros.
Six Big Losses
The six big loss categories, mapped to the three OEE factors.
Availability
Equipment breakdowns
Setup & changeover losses
Performance
Idling & minor stops
Reduced speed
Quality
Quality defects / scrap
Startup & rework losses
A more precise breakdown by individual cause comes from a Reason-Code-Logger with live machine data. Reason-Code-Logger
Benchmark
Your value
World-class target
85 %
World-class factors: Availability 90 % · Performance 95 % · Quality 99.9 %
Recommendations
Share & export your result
Your inputs are stored in the link – no account, no backend.
Request a live demo

Please fill in the required fields on the left to see your OEE result.

A free tool from SYMESTIC – Manufacturing Execution System from the cloud.
GUIDE

How the OEE calculator works

OEE (Overall Equipment Effectiveness) measures how productively a machine actually runs. In four steps you get your value – including the breakdown into Availability, Performance and Quality as well as the resulting loss in euros.

1
Capture time data
Enter the total shift time as well as planned (breaks, maintenance) and unplanned downtime (breakdowns, changeovers).
2
Production & Quality
Enter the ideal cycle time, parts produced, scrap and rework – the basis for Performance and Quality.
3
Economics (optional)
Enter the contribution margin per unit to see the hidden loss in euros per shift and per year.
4
Read your result
Your OEE value, the three factors, the biggest lever and the benchmark against the world-class target of 85 %.
The OEE formula
OEE = Availability × Performance × Quality
Availability
Operating time ÷ planned production time
World-class target: 90 %
Performance
(ideal cycle time × parts produced) ÷ operating time
World-class target: 95 %
Quality
Good parts ÷ parts produced
World-class target: 99.9 %
FAQ

Frequently asked questions about OEE calculation