LDL / VLDL Calculator
Friedewald LDL-C, estimated VLDL-C and non-HDL-C.
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Mr. Shankar Shahi is a Senior Medical Laboratory Technologist and Quality Control Expert with more than 20 years of experience in the medical laboratory field and more than 5 years of focused experience in Quality Control and Quality Management Systems.
His professional interests include clinical laboratory interpretation, internal quality control, external quality assessment, method verification, laboratory standardization, SOP development, staff training, and practical implementation of quality systems in diagnostic laboratories.
Clinical Laboratory Interpretation
Internal Quality Control
External Quality Assessment
Laboratory Quality Management Systems
Method Verification
Laboratory Standardization
SOP Development
Staff Training
Quick calculation tools for lipid, coagulation and kidney laboratory reporting
Friedewald LDL-C, estimated VLDL-C and non-HDL-C.
Open Calculator →INR from patient PT, mean normal PT and ISI.
Open Calculator →Calculate spot urine protein-to-creatinine ratio (uPCR).
Open Calculator →Calculate uACR and albuminuria category.
Open Calculator →2021 CKD-EPI creatinine equation for adults (race-free).
Open Calculator →Calculate MCV, MCH and MCHC from Hb, PCV and RBC count.
Open Calculator →Compact quick-access cards for your detailed QC tools
Mean, SD, CV%, Bias and SDI.
Open QC Tool →QC chart with mean and SD limits.
Open QC Tool →Precision and repeat comparison.
Open QC Tool →Old lot vs new lot verification.
Open QC Tool →Precision, bias, TEa and sigma.
Open QC Tool →Routine laboratory unit conversion.
Open QC Tool →Quick reference for alert limits.
Open QC Tool →Rule checker and QC decision support.
Open QC Tool →Likely errors and first actions.
Open QC Tool →Mean, SD, CV%, Bias% and SDI
Mean ±1SD, ±2SD, ±3SD and QC chart
Pair comparison, difference, % difference and repeatability
Compare old lot vs new lot paired results
Precision, Bias, TEa and Sigma Metric
Routine chemistry, hematology, thyroid and common hormone unit conversions
Common adult alert examples — customize to your laboratory policy
| Test | Example low alert | Example high alert | Unit / note |
|---|---|---|---|
| Glucose | < 50 | > 400 | mg/dL |
| Potassium | < 2.5 | > 6.5 | mmol/L |
| Sodium | < 120 | > 160 | mmol/L |
| Total calcium | < 6.5 | > 13.0 | mg/dL |
| Hemoglobin | < 6.5 | > 20 | g/dL; policy-dependent |
| Platelet count | < 20 | > 1000 | ×10⁹/L; context-dependent |
| WBC count | < 2.0 | > 50 | ×10⁹/L; local policy varies |
| INR | — | > 5.0 | Therapy/context dependent |
Critical-result thresholds vary by institution, population, method and clinical context. Use this table only as a quick educational example and replace it with your laboratory's approved policy before operational use.
1₂s, 1₃s, 2₂s, R₄s, 4₁s and 10x
Rule pattern → likely error type → practical first actions
Likely: Early warning, possible random or systematic shift.
First actions: Check next QC result, review reagent/control handling, do not reject solely on 1₂s unless local policy says so.
Likely: Significant random or systematic error.
First actions: Reject run, repeat QC after checking pipetting, reagent/control preparation, instrument flags and calibration status.
Likely: Systematic error, shift or trend.
First actions: Review calibration, reagent lot, control lot, maintenance, temperature and recent changes; recalibrate when justified.
Likely: Random error / imprecision.
First actions: Check pipetting, aspiration, bubbles, probe condition, mixing, sample volume and mechanical instability.
Likely: Reagent/calibrator/control lot effect or recalibration issue.
First actions: Perform lot-to-lot verification, review calibration and target values, compare old vs new lot.
Likely: Calibration drift, reagent deterioration, temperature or component aging.
First actions: Review maintenance logs, reagent stability, calibration trend, temperature and instrument performance.
These calculators are educational/practical support tools. Final QC acceptance, method verification, lot acceptance and critical-result handling must follow your laboratory's validated procedure, analyzer instructions, approved QC policy and applicable accreditation requirements.
Latest installer available directly from this website.
A combined Windows desktop suite for laboratory Quality Management and Inventory Management, designed around practical QC, documentation, stock control and day-to-day laboratory workflows.
Quality Management Software and get Inventory Management Software FREE.
One combined Windows desktop suite • Trial version available • License activation after purchase
A Windows desktop application for patient registration, sample collection, billing, result entry, verification and professional laboratory reporting—all in one practical workflow.
From patient registration to a professional laboratory report.
Windows desktop software • Try it free for 90 days • Setup support available
See patient and test counts, pending results, revenue and dues, with quick access to daily tasks.
View Dashboard ↗
Laboratory branding, a barcode, verified status and organized results with reference ranges and abnormal flags.
View Sample Report ↗Watch selected Lab Guru Shankar videos here. Click any video card to open the original video on YouTube.
▶सफ्टवेयर कसरी चलाउने? यसका सुविधाहरू नेपालीमा सिक्नुहोस्।
▶Open and watch on Lab Guru Shankar YouTube.
▶Open and watch on Lab Guru Shankar YouTube.
▶Open and watch on Lab Guru Shankar YouTube.
▶Open and watch on Lab Guru Shankar YouTube.
A Practical Pocket Guide for Medical Laboratory Professionals and Clinicians
Pattern-based interpretation with practical clinical correlation, key possibilities to think of, useful patterns and what to check next.
Full PDF is not publicly stored on this website. The private download link will be provided after payment confirmation.
A Day-to-Day Guide for Quality Control, Quality Assurance and Laboratory Quality Systems
Bring quality into every laboratory day with practical IQC, Levey-Jennings charts, Westgard rules, troubleshooting, SOPs, CAPA and ready-to-use checklists.
The complete digital PDF will be provided after payment confirmation.
1. Pay Rs. 200 via eSewa.
Name: Shankar Shahi
Number: 9841467187
2. Send your payment screenshot or transaction ID on WhatsApp.
3. Receive the digital PDF download link after payment confirmation.
Send Payment Proof on WhatsApp
Principles, Procedures, Calculations, Interpretation and Reporting
A practical manual for laboratory professionals and students covering synovial, ascitic, pleural, cerebrospinal and pericardial fluids, plus semen, urine and stool analysis.
Preview the first 71 of 141 pages. The complete digital PDF will be provided after payment confirmation.
1. Pay Rs. 150 via eSewa.
Name: Shankar Shahi
Number: 9841467187
2. Send your payment screenshot or transaction ID on WhatsApp.
3. Receive the digital PDF download link after payment confirmation.
Send Payment Proof on WhatsAppRead laboratory and quality-management presentations online. Direct PowerPoint download links are not provided.
An Overview of Quality Control, Quality Assurance and Total Quality Management.
64 slides • Online view onlyDifference between standard, calibrator and control and their laboratory use.
22 slides • Online view onlyPatient preparation for laboratory tests and venous blood collection order of draw.
27 slides • Online view onlyPreparation and use of quality control sera with interpretation and monitoring of QC results.
49 slides • Online view onlySOP importance, structure, components and the process to develop a laboratory SOP.
34 slides • Online view onlyLaboratory books, presentations, software and educational resources are organized here for easy access.
Shankar QMS and future laboratory software projects.
View Software →Laboratory, quality control and educational books.
View Books →Read laboratory and quality-management presentations online.
View Presentations →SOPs, forms, manuals and useful laboratory documents.
View Documents →Sample Glucose (GOD-POD) SOP showing document control, principle, specimen, QC, procedure template, safety, records and revision history.
The sample SOP is available now. Other download links will be connected as additional software, books, PowerPoint and laboratory documents are added.
For laboratory education, quality management, books, software support and professional collaboration.