Levey–Jennings Chart
with Westgard Multi-Rules Engine & Daily Log
LJ Chart & Westgard Rules
Daily QC Log
Saved Sessions
PDF Export
Session Details
Laboratory Name
Analyst Name
Test Name
Month/Year
Data Input
Please enter at least 2 numeric values.
Custom Mean & SD
Override calculated values with your own reference
Mean ()—
SD (σ)—
In Control—
Violations—
Levey–Jennings Plot
Enter QC values and click Plot Chart to view the LJ chart
Points
In control
Warning
Reject
Lines
Mean
±1 SD
±2 SD
±3 SD
Westgard Rule Interpretation
Warning
Reject
Westgard rule violations will appear here after plotting.
QC DecisionAwaiting data…Plot the chart to see your Westgard QC decision.
📅 Daily QC Log
Daily QC Value Log
AUTO-SAVED
Date
QC Value
Please enter a valid date and numeric value.
Tip: Add one QC value per day. Use Plot from Log to generate the LJ chart from all saved entries in date order.
Entries are automatically saved in your browser's local storage and will persist when you close or refresh this page.
| # | Date | QC Value | Z-Score | Status | |
|---|---|---|---|---|---|
| No entries yet. Add a date and value above to start your daily log. | |||||
📊 Saved Sessions
Sessions — Compare by Date
No saved sessions yet. Click Save Session after plotting.