Type 1 Diabetes Bolus Calculator
Calculates rapid-acting insulin dosage based on carbohydrate intake and correction factors (ICR, ISF). Supports mg/dL and mmol/L.
About
Managing Type 1 Diabetes involves solving a complex mathematical equation before every meal. The total insulin dose (Bolus) consists of two parts: the "Food Bolus" to cover carbohydrates, and the "Correction Bolus" to bring high blood glucose down to target. Manual calculation during hypoglycemic or hyperglycemic episodes is prone to cognitive error.
This tool helps standardize that process using user-specific ratios: the Insulin-to-Carb Ratio (ICR) and the Insulin Sensitivity Factor (ISF). Note: This tool is for educational simulation and should not replace advice from an endocrinologist.
Formulas
The Total Bolus Btotal is the sum of the Food Bolus and Correction Bolus:
If the result is negative (due to low BG), the negative correction subtracts from the food bolus to prevent hypoglycemia.
Reference Data
| Parameter | Abbreviation | Typical Unit | Description |
|---|---|---|---|
| Blood Glucose | BG | mg/dL or mmol/L | Current sugar level in blood. |
| Insulin-to-Carb Ratio | ICR | g/Unit | Grams of carbs covered by 1 unit of insulin. |
| Insulin Sensitivity Factor | ISF | mg/dL/Unit | How much 1 unit drops BG. |
| Target Glucose | Target | mg/dL or mmol/L | Desired blood sugar level (e.g., 100 mg/dL). |
| Active Insulin | IOB | Units | Insulin remaining from previous doses. |