Life-threatening pediatric emergencies are rare events in which precise, correct and fast drug dosing is essential. Intravenous drugs are most commonly dosed based on the child's weight in mg/kg. Numerous tools exist for aiding the physician in the error prone calculation, none of which meet all criteria for the perfect tool. Besides frequent training of practical skills and awareness of the problem of calculating the exact drug dose, it seems indispensable to have a localized tool at hand for these critical events.