Free OEE calculator – fast and accurate
What is OEE and why is calculation important?
The Overall Equipment Effectiveness (OEE) is the most important metric for measuring total equipment effectiveness in production. It combines the three critical factors Availability, Performance, and Quality into a single, meaningful percentage.
With our OEE calculator, you can quickly and precisely assess your equipment efficiency, identify improvement opportunities, and calculate the ROI of optimization measures.
85%
World-class OEE target
65-75%
Average
< 50%
Critical
⚡ OEE Calculator Quick Facts
✓
Hard & soft basis calculation
💰
ROI analysis & savings potential
📊
Benchmark classification
🚀
Improvement recommendations
🏭 OEE Calculator Professional
Calculate your Overall Equipment Effectiveness with hard & soft basis + ROI analysis
⏰ Step 1: Capture Time Data
Production Times According to SYMESTIC Standard
💡 Critical Success Factors
Hard Basis: All downtime (planned + unplanned) reduces OEE
Soft Basis: Only unplanned downtime reduces OEE
Soft Basis: Only unplanned downtime reduces OEE
Complete shift time (e.g., 360 Min = 6h)
Breaks, shift changes, planned maintenance
✓ Automatically calculated
Machine failure, changeovers, breakdowns
Material shortage, staff unavailable, etc.
✓ Automatically calculated
⚡ Step 2: Production & Quality Data
Theoretically fastest time per piece
✓ Automatically calculated
Total produced parts
Faulty/defective parts
Parts that required rework
✓ Automatically calculated
💰 Step 3: ROI & Loss Analysis (Optional)
For ROI calculation
Working days excluding weekends
3-shift operation = 24h
📊 Step 4: OEE Calculation & Analysis
Enter your production data to start the OEE calculation
📐 OEE Formula: How to Calculate Overall Equipment Effectiveness
OEE = Availability × Performance × Quality
A = 90%
×
P = 85%
×
Q = 95%
=
72.7%
🕒 Calculate Availability
Availability = (Available Time ÷ Planned Production Time) × 100
Measures the portion of time when the equipment is actually producing (without unplanned downtime).
⚡ Calculate Performance
Performance = (Produced Parts ÷ Theoretically Possible Parts) × 100
Compares actual with maximum possible production speed.
✅ Calculate Quality
Quality = (Good Parts ÷ Produced Parts) × 100
Proportion of error-free produced parts (First-Pass-Yield without rework).
❓ Frequently Asked Questions about OEE Calculation
What is the difference between hard and soft basis?
Hard Basis: All downtime (planned + unplanned) reduces OEE - stricter evaluation.
Soft Basis: Only unplanned downtime reduces OEE - planned downtime is considered unavoidable.
What is a good OEE value?
≥ 85%: World-class performance
75-85%: Very good performance
65-75%: Average range
< 65%: Needs improvement
How often should OEE be calculated?
For continuous improvement, daily or shift-based calculation is recommended. Modern MES systems like SYMESTIC calculate OEE automatically in real-time.
🚀 Optimize Your OEE with SYMESTIC CLOUD MES
Automate your OEE calculation with the leading cloud-native MES solution. Real-time dashboards, automatic data collection, and AI-based optimization recommendations.
Start working with SYMESTIC today to boost your productivity, efficiency, and quality!
