HBA1C Test
- Category
- Diabetes
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- All Ages
HbA1c (glycated haemoglobin) measures the percentage of haemoglobin in red blood cells that has glucose attached. It reflects your average blood sugar over the past 2–3 months. The report also shows an estimated average glucose.
Used to diagnose prediabetes (5.7–6.4%) and diabetes (6.5% or above) and to monitor long-term sugar control. Most adults with diabetes aim for below 7%, but your doctor will set your target.
People with diabetes (every 3–6 months), prediabetes, or risk factors such as obesity, family history, PCOS or age over 30.
No fasting needed.
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
Every 3 months if your diabetes is not well controlled or treatment has changed, and every 6 months if it is stable.
Yes — anaemia, recent blood loss or transfusion, pregnancy, kidney disease and some haemoglobin variants (e.g., thalassaemia trait) can falsely raise or lower it.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 12–36 hours after the sample reaches the lab. You will receive the report online.