--- title: "NZ Lab Results Converter: mmol/L and HbA1c mmol/mol | AumnI tools" description: "Convert blood test results between mmol/L and mg/dL and HbA1c between mmol/mol and %, starting in New Zealand laboratory units. A reading aid, not medical advice." url: https://aumnitools.com/nz/tool/medical-unit-converter category: "Health" country: "New Zealand" updated: 2026-11-08 --- # Medical Unit Converter Results from a New Zealand laboratory give glucose and cholesterol as mmol/L and HbA1c as mmol/mol. This converter opens with those, and shows the mg/dL and percentage figures alongside. Health NZ changed its HbA1c thresholds from 1 July 2026, so check any older result against the range on your own report. Ask your GP about what it means. ## New Zealand rules and figures - Health NZ gives HbA1c in mmol/mol: diabetes from 48 and prediabetes from 42 to 47. - Those HbA1c thresholds changed from 1 July 2026, so a result reported earlier may sit in a different band from one reported now. - New Zealand laboratories report glucose and cholesterol in mmol/L, so entry starts in SI units and mg/dL is the second figure. - The page starts body metrics in kilograms and centimetres, with temperature in °C. Sources: [Health NZ: Understanding your HbA1c results](https://www.healthnz.govt.nz/health-topics/tests-and-treatments/medical-tests-and-procedures/laboratory-tests/understanding-your-hba1c-results) (checked 2026-11-08) ## How the medical unit converter works Each test has one factor linking mmol/L style units and mg/dL style units. The New Zealand page starts with you typing SI values and, on the HbA1c tab, mmol/mol, then derives everything else. Formula: `HbA1c 42 mmol/mol ÷ 10.929 + 2.15 = 6.0%; average glucose = 28.7 × 5.99 − 46.7 = 125 mg/dL, then × 0.05551 = 7.0 mmol/L` - The Lab values tab begins in SI units, so mmol/L is typed and mg/dL appears beside it. - The HbA1c tab begins in mmol/mol, the way Health NZ reports it, and the percentage is derived with the IFCC equation. - Health NZ puts diabetes from 48 mmol/mol and prediabetes at 42 to 47, with thresholds that changed on 1 July 2026, so older figures may not match. - A band label on the tab is based on the percentage and is not a diagnosis. Your GP uses your report and history. - Height starts in centimetres and weight in kilograms, with temperature in °C. ## How to use the medical unit converter 1. **Look up the test.** Search by name, unit or panel, or pick a panel from the list. 2. **Check which unit you are typing.** The page begins with SI entry, and one press of the button changes to mg/dL. 3. **Type your result.** Enter the number and read the other unit and the badge on the row. 4. **Read an HbA1c.** The HbA1c tab begins in mmol/mol. Enter your result to see the percentage and an average glucose, or switch the small list to type a percentage. 5. **Open the other tabs.** Body metrics and Vitals start in centimetres, kilograms and degrees Celsius. 6. **Copy, export or start again.** Use Copy or Export CSV for rows with a value, or Reset to empty the page. ## Example: HbA1c and glucose in New Zealand units Typing 42 mmol/mol on the HbA1c tab gives 6.0% and an estimated average glucose of 125 mg/dL (7.0 mmol/L), and the tab labels the value Prediabetes range, which matches how Health NZ groups 42 to 47. On the Lab values tab, a glucose of 6.1 mmol/L becomes 110 mg/dL and the badge reads Above range. Both are bandings, not diagnoses. ## When to use the medical unit converter - **Reading a result from overseas.** Switch to mg/dL entry for a report from the US and read it in mmol/L. - **Comparing percentages and mmol/mol.** See an older percentage in the unit New Zealand laboratories now use. - **Looking at lipids.** Convert total, LDL and HDL cholesterol and triglycerides between units. - **Preparing for a GP visit.** Copy converted rows so you can discuss them at the appointment. ## What the medical unit converter does not do - The ranges here are one adult interval for every country. The range on your own laboratory report is the one to use. - HbA1c thresholds changed on 1 July 2026, and the band label on this page uses the percentage, so check the current Health NZ page for your result. - Conversions only help you read a number. Deciding what it means or changing treatment is for your GP. - Percentage and mmol/mol are linked by the IFCC fit, which gives close estimates rather than exact matches. ## When something else is a better fit - **When you want your own interpretation of a result**, use your clinician, who reads results against the lab's printed range and your history. - **When you want a general unit converter for length, weight or volume**, use the [Unit Converter](https://aumnitools.com/tool/unit-converter.md). - **When you want body metrics with more measurements**, use the [BMI Calculator](https://aumnitools.com/tool/bmi-calculator.md). ## Questions about the medical unit converter ### What HbA1c unit does New Zealand use? Health NZ reports HbA1c in mmol/mol. The page begins there and shows the percentage as the second figure. ### What does 42 mmol/mol mean? Health NZ groups 42 to 47 as prediabetes. The converter shows 42 as 6.0% with an average glucose of 125 mg/dL, and your GP can explain what that means for you. ### Did the thresholds change recently? Yes, Health NZ says they changed from 1 July 2026. Check the current Health NZ page when comparing an older result. ### How do I convert mmol/L glucose to mg/dL? Divide by 0.05551. For a result of 6.1 mmol/L the tool shows 110 mg/dL. ### Can I use this to decide on treatment? No. The tool is for reading units. Treatment questions go to your GP or diabetes team. ## Related tools - [BMI Calculator](https://aumnitools.com/tool/bmi-calculator.md): Works out BMI and its category from height and weight, with the healthy weight range - [Blood Pressure Tracker](https://aumnitools.com/tool/blood-pressure-tracker.md): Logs blood pressure readings, classes each against ACC/AHA categories and shows averages - [Medical Age Calculator](https://aumnitools.com/tool/medical-age-calculator.md): Chronological, corrected and post-menstrual age for preterm babies, with vital ranges ## About this page Runs in your browser: what you enter is processed on this device and is not uploaded. General information only, not medical advice. Talk to a doctor or other health professional about decisions that affect your health. Last checked against the tool's code on 2026-11-08. Interactive version: https://aumnitools.com/nz/tool/medical-unit-converter