Carb-counting mealtime insulin bolus
Carb-counting insulin bolus (ADA Standards of Care): meal bolus = carbs / IC ratio, correction = (current - target) / ISF (floored at 0), and the total.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Carbohydrates
- 60 g
- Insulin-to-carb ratio
- 10
- Correction factor / ISF
- 50 mg/dL per unit
- Current glucose
- 180 mg/dL
- Target glucose
- 120 mg/dL
Result: Meal 6 U + correction 1.2 U = 7.2 U total.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Carbohydrates
- Insulin-to-carb ratio (1 unit : N g)
- Correction factor / ISF
- Current glucose
- Target glucose
How this is calculated
American Diabetes Association. Standards of Care in Diabetes. Diabetes Care. 2025;48(Suppl 1) (carbohydrate counting / insulin dosing). Meal bolus = carbs / IC ratio; correction = (glucose - target) / ISF, floored at 0. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.