Bicarbonate Deficit + Sodium Deficit
Bicarbonate and sodium deficit estimates from total body water (sex-based fraction), measured vs target values.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Weight
- 70 kg
- Sex
- Male (0.6)
- Measured HCO3
- 14 mEq/L
- Target HCO3
- 24 mEq/L
- Measured Na
- 120 mEq/L
- Target Na
- 135 mEq/L
Result: HCO3 deficit 350 mEq; Na deficit 630 mEq (limit Na correction to <=8 mEq/L/24h).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Weight
- Sex (TBW fraction)
- Measured HCO3
- Target HCO3
- Measured Na
- Target Na
How this is calculated
Adrogue HJ, Madias NE. NEJM. 2000;342(20):1493-1499 (sodium). HCO3 deficit = 0.5 x weight x (target - measured); Na deficit = TBW x (target - measured). Deficit estimates, not infusion rates. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.