Potassium Deficit Calculator

Generally, 10 mEq of potassium raises serum level by about 0.1 mEq/L, assuming normal renal function. This varies based on total body deficit, acid-base status, and kidney function.

Magnesium is required for the kidneys to retain potassium. If magnesium is low (below 1.7 mg/dL), potassium replacement will be ineffective because the kidneys continue wasting potassium.

Serum potassium reflects only about 2% of total body potassium. A serum level of 3.0 mEq/L may represent a total body deficit of 200 to 400 mEq or more.

Mild hypokalemia may cause muscle weakness, cramps, and fatigue. Severe hypokalemia (below 2.5 mEq/L) can cause paralysis, rhabdomyolysis, and dangerous cardiac arrhythmias.

Mild hypokalemia (3.0 to 3.5 mEq/L) can often be treated orally (40 to 80 mEq/day). Severe cases (below 2.5 mEq/L) require IV replacement with cardiac monitoring.

No. This tool is for educational purposes only. Potassium replacement should always be managed by a healthcare professional with appropriate monitoring.

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