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Carb ratio
Correction
Target BG
Carbs (g)
?
Grams of carbohydrate in the meal. Drives the carb bolus.
Fat (g)
?
Fat at 9 kcal/g drives extended bolus duration. High-fat meals cause delayed BG rise 2–4 hrs later.
Protein (g)
?
Protein at 4 kcal/g also contributes to FPU calculation and extended bolus duration.
Current BG (mg/dL)
?
Your CGM reading right now. If below 70, treat the low first — no dose will be calculated.
IOB (units)
?
Insulin on board — read from your pump screen. Reduces the correction component to prevent stacking.
CGM trend
?
The direction BG is moving. Adjusts the effective BG used for the correction calculation.
Vigorous play
50% carb bolus
Moderate
75%
Sedentary
100%
Swimming
0%
Illness
125%
High fever
150%
History
30 days
60 days
90 days
Food library
Patients
Household invite code
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How it works
Warsaw Method · Bolus Boss v2.1 · April 2026
The Warsaw Method
Developed at the Children's Memorial Health Institute in Warsaw, Poland. Accounts for carbohydrates, pre-meal BG, planned activity, and fat/protein via Fat-Protein Units (FPUs) to determine extended bolus duration.
Formula
Carb bolus = Carbs ÷ ICR × Activity modifier
Adjusted BG = Current BG + Trend adjustment
Correction = (Adj BG − Target) ÷ CF − IOB (floored at 0)
Total dose = Carb bolus + Correction
FPUs = (Fat × 9 + Protein × 4) ÷ 100
Extended duration = FPUs rounded, capped 8 hrs
Fat/protein dose = FPUs × 10 ÷ ICR — full dose, no CIQ reduction (CIQ cannot auto-bolus during an active extended bolus)
FPUsExample mealsDuration
<1Toast, fruitNone
1Eggs, small pasta1 hr
2Mac & cheese2 hrs
3Nuggets + fries3 hrs
4Large burger + fries4 hrs
5Pizza 2–3 slices5 hrs
6Pizza 3–4 slices6 hrs
7Large pizza meal7 hrs
8+Very large high-fat meal8 hrs max
FPU cap — fixed. Updated from 4-hr to full 8-hr linear scale.
CIQ reduction — removed. CIQ firmware locks out auto-bolus for the entire extended bolus duration plus 60 minutes after. Full Warsaw fat/protein dose is used. CIQ can still increase basal during the window.
CGM trend — community practice, not Warsaw spec. ±15/30/45 adjustments are widely used but not in the original paper.
Activity on carb bolus only. Correction calculated separately to avoid under-treating highs during activity.
Clinical disclaimer: Bolus Boss is a decision-support tool. All doses must be reviewed before administration. Never bolus into a low. Always verify BG on your CGM before dosing. This does not replace your endocrinology team.
Bolus Boss v2.1 · Supabase · Cloudflare · Secure
Confirm dose
Review before delivering insulin
Pre-bolus timer
Wait before starting the meal
15:00
until meal time
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Food
Portions
¼1 serving