Warsaw Method Calculator

What Is the Warsaw Method in Diabetes Management?

The Warsaw Method (also known as the Pańkowska method) is an advanced insulin dosing strategy developed for individuals with Type 1 diabetes who use continuous subcutaneous insulin infusion (CSII / insulin pumps). While traditional carb counting calculates insulin boluses solely based on dietary carbohydrates, meals rich in fats and proteins (such as pizza, steak, lasagna, and barbecue) cause delayed postprandial hyperglycemia that peaks 3 to 8 hours after eating.

The Warsaw Method translates the energetic content of fats and dietary proteins into Fat-Protein Units (FPU) to calculate both the additional insulin dose and the optimal duration for a dual-wave (combo) or extended square-wave bolus. You can also estimate mealtime bolus requirements using our Insulin Dosage Calculator or calculate carbohydrate targets with the Net Carbs Calculator.

How the Warsaw Method Calculates FPU and Extended Boluses

The method uses standard nutritional energy conversions:

• Fat Energy (kcal) = Fat (grams) × 9 kcal/g
• Protein Energy (kcal) = Protein (grams) × 4 kcal/g
• Total Fat-Protein Calories = Fat Energy + Protein Energy
• Fat-Protein Units (FPU) = Total Fat-Protein Calories / 100
• Carbohydrate Equivalent = Total Fat-Protein Calories / 10 = FPU × 10 grams

Dual-Wave Bolus Splitting and Extended Duration

With an insulin pump, the total meal bolus is split into:

1. Normal Bolus (Immediate): Covers the fast-acting carbohydrates: Normal Insulin (U) = Carbs (g) / ICR.
2. Extended Bolus (Square Wave): Covers the delayed fat and protein absorption: Extended Insulin (U) = Carb Equivalent (g) / ICR.