Work out potassium replacement instantly with clear inputs, formula shown and shareable results.
Uses the widely quoted rule that each 0.3 mmol/L fall in serum potassium reflects roughly a 100 mmol total body deficit, then converts that into infusion time or oral doses.
Potassium deficit
Deficit (mmol) = (target K - current K) / 0.3 x 100; hours = deficit / infusion rate
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Peripheral infusions are commonly limited to 10 mmol/h; faster rates need central access and cardiac monitoring.
It is a rough guide only; acid-base state and insulin shift potassium between compartments and change the relationship.