Diabetes & Blood Sugar
Blood sugar control is central to health, and understanding your numbers helps you stay informed. Our free diabetes and blood sugar tools help you interpret glucose readings and HbA1c, and understand related measures — clearly and without jargon. These tools are educational and support, but do not replace, advice from your doctor, who interprets your results in the context of your overall health.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at complete rest to keep you alive. The foundation for understanding your energy needs.
HbA1c to Average Glucose Converter
Convert your HbA1c percentage to estimated average blood glucose (eAG), or work backwards from your average glucose to HbA1c. Shows results in both mmol/L and mg/dL.
Blood Sugar Interpreter
Understand your blood sugar test result for fasting, random, post-meal and HbA1c.
eGFR Calculator (Kidney Function)
Estimate your kidney function (eGFR) from your creatinine level, age and sex using the CKD-EPI 2021 equation used in clinical practice worldwide.
Understanding blood sugar and HbA1c
Blood sugar (glucose) is the body's main fuel, and keeping it in a healthy range matters. Several tests assess it: a fasting glucose measures your level after not eating, a random glucose at any time, and HbA1c reflects your average blood sugar over the past two to three months. Together these help screen for and monitor diabetes and prediabetes.
HbA1c is especially useful because it smooths out day-to-day fluctuations, giving a longer-term picture. Our blood sugar interpreter and HbA1c converter help you understand where your readings fall within commonly used ranges. As always, these are interpreted by a doctor alongside your symptoms and overall health, not in isolation.
Diabetes, prediabetes and risk
Diabetes is a condition where blood sugar is too high, either because the body does not make enough insulin or cannot use it effectively. Type 2 diabetes, the most common form, often develops gradually and is strongly linked to lifestyle factors, though genetics and age also play a part. Prediabetes means blood sugar is higher than normal but not yet in the diabetes range — an important window where changes can make a real difference.
Understanding your blood sugar numbers helps you and your doctor assess your risk and catch problems early. Many people with early high blood sugar have no symptoms, which is why testing matters. If your readings are raised, the right step is to discuss them with your doctor, who can advise on confirmation, monitoring and any helpful changes.
Using these blood sugar tools
Our diabetes tools include a blood sugar interpreter that shows where a glucose reading falls within commonly used ranges, and an HbA1c converter that translates between HbA1c and estimated average glucose. Each helps you make sense of your numbers and prepare for a conversation with your healthcare provider.
These tools are educational reference tools, not a diagnosis. Blood sugar results are interpreted by a doctor in the context of your full health, symptoms and other tests. If you have concerns about diabetes or raised blood sugar, your doctor is the right person to interpret your results and advise on next steps.
Frequently asked questions
What is a normal blood sugar level?
Normal ranges vary by test: fasting glucose is generally considered normal below around 5.6 mmol/L (100 mg/dL), with higher ranges indicating prediabetes or diabetes. HbA1c below 42 mmol/mol (6.0%) is typically normal. Ranges and units vary, so your doctor interprets your result against the values your laboratory uses and your overall health.
What is the difference between blood sugar and HbA1c?
A blood sugar (glucose) test measures your level at a single moment, which varies through the day. HbA1c reflects your average blood sugar over the past two to three months, giving a longer-term picture that smooths out daily fluctuations. Both are useful, and our tools help you understand each. A doctor interprets them together.
Are these diabetes tools a diagnosis?
No. These are educational reference tools that show where blood sugar readings fall within commonly used ranges. They do not diagnose diabetes. Blood sugar results must be interpreted by a doctor, who considers your full health, symptoms and other tests, and arranges any confirmation testing needed before a diagnosis is made.