Diabetes & Blood Sugar calculators
A1C, insulin resistance and glucose tools.
A1C to Average Glucose Calculator
Convert HbA1c to estimated average glucose.
Average Glucose to A1C Calculator
Estimate HbA1c from average glucose readings.
Blood Glucose Converter & Checker
Convert mg/dL and mmol/L and check fasting levels.
HOMA-IR Calculator
Insulin resistance estimated from fasting glucose and insulin.
QUICKI Insulin Sensitivity Calculator
Insulin sensitivity index from fasting labs.
Insulin-to-Carb Ratio Calculator
Educational estimate of meal and correction insulin.
Total Daily Insulin Estimator
Typical basal and bolus split, for education.
Glycemic Load Calculator
How much a food portion raises blood sugar.
Type 2 Diabetes Risk Score
ADA-style risk points from lifestyle and history.
Time in Range & GMI Calculator
CGM time in range and glucose management indicator.
Fasting Glucose Category Calculator
Classify a fasting blood glucose result using ADA thresholds.
Two-Hour Glucose Tolerance Category
Classify a 2-hour oral glucose tolerance test result.
Glucose Variability Calculator
Coefficient of variation from several glucose readings.
Insulin Correction Dose Calculator
Estimate a correction dose from current glucose, target and correction factor.
Low Blood Sugar Treatment Calculator
Check whether a reading is low and how much fast-acting sugar to take (rule of 15).
HOMA-B Beta-Cell Function Calculator
Estimate pancreatic beta-cell function from fasting glucose and insulin.
Urine Albumin-to-Creatinine Ratio Calculator
Classify kidney damage risk from urine albumin and creatinine.
Insulin Pen Days Supply Calculator
Days left in your insulin pen or vial at your daily dose.
Glucose Test Strip Supply Calculator
How many test strips you need per month and how long a box lasts.
A1C Unit Converter (% and mmol/mol)
Convert HbA1c between percentage and IFCC mmol/mol units.
Carbohydrate Budget per Meal Calculator
Split your daily carbohydrate allowance across meals and snacks.
Plate Method Portion Calculator
Split a meal into vegetables, protein and starch using the plate method.
Glucose Meter Accuracy Check
Compare a meter reading against a lab value using the ISO 15197 accuracy limits.
1800 Rule Correction Factor Calculator
Estimate how far 1 unit of rapid insulin lowers glucose from your total daily dose.
Average of Glucose Readings Calculator
Average several glucose readings to see the overall trend.
Related guides
HbA1c Explained: What Your Result Means
A1C shows average blood sugar over about three months.
Diabetes & Blood SugarPrediabetes: Can You Reverse It?
Lifestyle changes can cut the risk of progressing to type 2 diabetes by more than half.
Diabetes & Blood SugarFasting Blood Sugar Ranges and Units
Normal, prediabetes and diabetes ranges in mg/dL and mmol/L.