# Lab report tools

> Doctano turns the lab reports you already have into one private, source-linked health timeline, with an AI that answers from your own results.

Convert a unit or check a published equation, with the formula and its limits in plain sight.

This is the Markdown version of https://doctano.com/tools/. The HTML page is the canonical version.

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.

## The tools

| Tool | What it calculates | Basis |
| --- | --- | --- |
| [Unit converter](https://doctano.com/tools/unit-converter) | Conventional and SI values for common markers | Published conversion factors |
| [eGFR calculator](https://doctano.com/tools/egfr-calculator) | Estimated glomerular filtration rate | CKD-EPI 2021 creatinine, race-free |
| [LDL calculator](https://doctano.com/tools/ldl-calculator) | Calculated LDL cholesterol | Friedewald equation, 1972 |
| [HOMA-IR calculator](https://doctano.com/tools/homa-ir-calculator) | A fasting insulin and glucose index | Original HOMA equation, 1985 |
| [HbA1c calculator](https://doctano.com/tools/hba1c-calculator) | NGSP percentage and IFCC mmol/mol | NGSP master equation |

## Choose a calculation

- [Unit converter](https://doctano.com/tools/unit-converter): convert mg/dL and mmol/L, ng/mL and nmol/L, and other common units.
- [eGFR calculator](https://doctano.com/tools/egfr-calculator): CKD-EPI 2021, without a race coefficient, with the equation written out.
- [LDL calculator](https://doctano.com/tools/ldl-calculator): Friedewald, with the triglyceride caveat stated rather than hidden.
- [HOMA-IR calculator](https://doctano.com/tools/homa-ir-calculator): the original fasting insulin and glucose index, with its limits.
- [HbA1c calculator](https://doctano.com/tools/hba1c-calculator): convert the NGSP percentage and the IFCC mmol/mol scale.

## 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.

## Tool questions

**Are the tools free?**

Yes. The calculators are public and free to use, and they do not require a Doctano account. Doctano itself is free to use.

**Do the calculators store the values I type?**

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.

**Why is there no normal range in the results?**

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.

**Are these tools medical devices or medical advice?**

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.

## Limits

**These are calculations, not diagnoses.** A converted unit, an estimate, or an index does not tell you whether a value is normal. Use the range on your report and discuss the result with a qualified professional.

## Links

- [Homepage](https://doctano.com/)
- [Lab report tracker](https://doctano.com/lab-report-tracker)
- [All tests](https://doctano.com/tests/)
- [All panels](https://doctano.com/panels/)
- [Lab report units](https://doctano.com/guides/lab-report-units)
- [Reference ranges](https://doctano.com/guides/reference-ranges)
- [All guides](https://doctano.com/guides/)