Understanding HbA1c: What Your Numbers Mean
Decoding your blood test results. Learn how A1c provides a window into your long-term glucose control and what the target ranges signify.
1. What HbA1c Actually Measures
Unlike a single fasting glucose reading, HbA1c reflects your average blood sugar level over the preceding two to three months by measuring the percentage of haemoglobin coated in sugar. This makes it one of the most reliable long-term indicators of glucose control available.
2. Understanding Your A1c Ranges
| Category | A1c Range | What It Means |
|---|---|---|
| Normal | Below 5.7% | Healthy long-term glucose control |
| Prediabetes | 5.7% - 6.4% | Elevated risk; lifestyle changes recommended |
| Diabetes | 6.5% or higher | Confirms a diabetes diagnosis on repeat testing |
| Typical Treatment Target | Below 7.0% | Common goal for most adults managing diabetes |
Targets Are Individualised
Your ideal A1c target may differ from the general guideline based on age, other health conditions, and risk of low blood sugar — always confirm your personal target with your endocrinologist.
3. What Can Affect Your A1c Reading
- •Diet quality and carbohydrate intake patterns over the preceding weeks.
- •Physical activity levels, which improve insulin sensitivity.
- •Certain blood disorders, such as anaemia, which can skew results independent of glucose control.
- •Medication adherence and dosage consistency.
Frequently Asked Questions
Most people with diabetes should test every 3 to 6 months, while those at risk of prediabetes are typically screened annually.
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