Lab report tools
Convert a unit or check a published equation, with the formula and its limits in plain sight.
Five free calculators for the numbers people meet on a lab report: a unit converter, an eGFR estimate, a Friedewald LDL calculation, HOMA-IR, and an HbA1c scale conversion. Each states its equation and returns a calculation, not a diagnosis or a reference range.
| Tool | What it calculates | Basis |
|---|---|---|
| Unit converter | Conventional and SI values for common markers | Published conversion factors |
| eGFR calculator | Estimated glomerular filtration rate | CKD-EPI 2021 creatinine, race-free |
| LDL calculator | Calculated LDL cholesterol | Friedewald equation, 1972 |
| HOMA-IR calculator | A fasting insulin and glucose index | Original HOMA equation, 1985 |
| HbA1c calculator | NGSP percentage and IFCC mmol/mol | NGSP master equation |
Tools
Choose a calculation
Unit converter
Convert mg/dL and mmol/L, ng/mL and nmol/L, and other common units.
Open →eGFR calculator
CKD-EPI 2021, without a race coefficient, with the equation written out.
Open →LDL calculator
Friedewald, with the triglyceride caveat stated rather than hidden.
Open →HOMA-IR calculator
The original fasting insulin and glucose index, with its limits.
Open →HbA1c calculator
Convert the NGSP percentage and the IFCC mmol/mol scale.
Open →What the tools do not do
- They do not print a reference range or a target.
- They do not label a result normal, low, high, or abnormal.
- They do not diagnose a condition or recommend treatment.
- They do not replace the value, unit, or range on your report.
Questions
Tool questions
Yes. The calculators are public and free to use, and they do not require a Doctano account. Doctano itself is free to use.
The calculators run in your browser and do not send the values you type to Doctano. They are calculations, not uploads, and they do not create a report or save a result.
Each tool returns a calculation: a converted unit, an estimate, or a calculated index. It does not apply a reference range, a target, or a diagnostic category, because those depend on the laboratory, the method, and the person. Use the range on your report.
No. They are informational calculations from published equations and conversion factors. They do not diagnose, treat, or replace a qualified professional, and they are not medical devices.
Related
Related pages
All tests
Sixty-one pages on individual results, from HbA1c to NT-proBNP.
Browse →All panels
The panels that arrive together on a report, explained as a group.
Browse →Lab report units
Conventional and SI units, notation, and why converting is not comparing.
Read →Reference ranges
Why the range on the paper wins over a chart.
Read →Start with your first report
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