Sodium Bicarbonate Dose Calculator (Base Deficit) for Dogs & Cats
Bicarbonate deficit in mEq from the base deficit — or with the conservative formula from measured HCO₃⁻ — and the initial fraction to give.
Results are calculated in your browser. Always double-check before administering and use your clinical judgement.
How it is calculated
Bicarbonate deficit (mEq) = (base deficit × body weight in kg) ÷ 4 [1].
Conservative formula: 0.4 × body weight (kg) × (12 − measured HCO₃⁻) = replacement dose in mEq [1].
Give only a quarter to a half of the total calculated dose and repeat blood gases in 5 to 10 minutes [1].
Worked example
20 kg, base deficit 12: 12 × 20 ÷ 4 = 60 mEq (give 15–30 mEq first).
Frequently asked questions
How much sodium bicarbonate should I give?
Bicarbonate deficit (mEq) = base deficit × body weight (kg) ÷ 4; administer only a quarter to a half of the total calculated dose and repeat blood gases in 5 to 10 minutes [1].
More electrolytes & acid–base calculators
References
For veterinary professionals. Information supports — never replaces — clinical judgement; always check the current product label and local regulations.