Insulin Intensive Multiple Daily Injections (MDI) Calculator

Calculator

This tool estimates basal insulin, meal-related boluses, and the insulin-to-carbohydrate ratio (I:CR) based on current weight, selected units/kg, and total daily carbohydrates.

Current weight

Choose lb or kg. (Calculator uses actual body weight.)

Insulin dose (units/kg) Choose a value using the gestational-age table at right/below.

Total daily carbohydrates (g/day) Example Sweet Success diet often uses ~225 g/day.

Tip: If results look off, confirm units/kg and weight units.

Clinical note: These are educational estimates. Dose selection and titration must be individualized.

Units/kg guide (Sweet Success 2012)

Weeks of gestation	Insulin units/kg (actual body weight)
Weeks of gestation	Type 1*	Type 1* with BMI > 30, Type 2, or uncontrolled GDM*
Weeks 1 to 17	0.3 to 0.5	0.7 to 0.8
Weeks 18 to 24	0.6 to 0.7	0.8 to 1.0
Weeks 25 to 32	0.8 to 0.9	0.9 to 1.2
Weeks 33 to 38	0.9 to 1.0	1.2 to 2.0
Postpartum	0.3 to 0.5	0.5 to 0.7

* Type 1: pancreas does not produce insulin.
** Type 2: insulin resistance.
*** GDM: gestational diabetes.
^ I:CR = total daily carbohydrate grams ÷ total daily dose of insulin.

References

1. Shields L, Tsay GS (eds). California Diabetes and Pregnancy Program Sweet Success Guidelines for Care. Revised edition July 2012. PDF (see p. 48).

Disclaimer

All calculations must be confirmed before use. The suggested results are not a substitute for clinical judgment.