Blood Sugar Calculator
Free Blood Sugar Calculator to check your glucose levels. Categorize fasting, post-meal, random, and HbA1c readings as normal, pre-diabetic, or diabetic.
About This Calculator
Check your blood sugar level against standard ranges. Whether you've taken a fasting, post-meal, random test, or HbA1c, our calculator helps you understand where you stand.
Frequently Asked Questions
What is normal blood sugar?
Normal ranges: Fasting: 70-100 mg/dL, Post-meal (2hr): <140 mg/dL, Random: <140 mg/dL, HbA1c: <5.7%. Pre-diabetic: Fasting 100-125, Post-meal 140-200, HbA1c 5.7-6.4%. Diabetic: Fasting 126+, Post-meal 200+, HbA1c 6.5%+.
What is the difference between fasting and post-meal blood sugar?
Fasting blood sugar is measured after 8+ hours without food - it indicates baseline glucose regulation. Post-meal (postprandial) blood sugar is measured 2 hours after eating - it shows how well your body handles glucose from meals.
What is HbA1c and why is it important?
HbA1c (glycated hemoglobin) reflects average blood sugar over the past 2-3 months. It measures how much glucose is attached to hemoglobin in red blood cells. Unlike finger-prick tests, it provides a long-term picture of glucose control.
How can I lower my blood sugar naturally?
Exercise regularly (150+ min/week), eat low-glycemic foods, reduce sugar and refined carbs, increase fiber intake, stay hydrated, manage stress, get adequate sleep, maintain healthy weight. Monitor portions and consider timing of meals.