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Calculate albumin-corrected serum calcium for hypocalcemia assessment. Enter total calcium and albumin to get corrected calcium level in mg/dL.
Estimate creatinine clearance with Cockcroft-Gault equation for drug dosing. Enter age, weight, sex, and serum creatinine for kidney function assessment.
Calculate IV drip rate in drops per minute and mL per hour. Enter volume, time, and drop factor for manual gravity drip rate nursing calculations.
Unmeasured anions minus unmeasured cations. Normal approximately 8–12 mEq/L using this formula without potassium.
AG = Na⁺ − (Cl⁻ + HCO₃⁻)Some references include K⁺ in the sum of measured cations. Normal ~10–14 mEq/L with this variant.
AG = (Na⁺ + K⁺) − (Cl⁻ + HCO₃⁻)Delta-delta analysis distinguishes concurrent acid-base disorders.
Δ Gap = AG − 12; Δ HCO₃ = 24 − HCO₃; Δ Gap ≈ Δ HCO₃ in pure high-AG acidosisUpdated: July 2026
AG = 130 − (95 + 10) = 25 — elevated anion gap metabolic acidosis. Evaluate ketones, glucose, lactate.
AG 10 with low HCO3 and elevated Cl suggests non-anion-gap acidosis (RTA, diarrhea, saline infusion).
Elevated AG with HCO3 higher than delta predicts concurrent metabolic alkalosis.
Compute the serum anion gap to evaluate metabolic acidosis etiology in clinical and educational settings. Enter sodium, chloride, and bicarbonate (and optionally potassium) to calculate AG and compare to normal range (8–12 mEq/L without K).