Dog Sodium Deficit Calculator
Calculate the sodium deficit and correct replacement fluid volume for hyponatraemic dogs — with correction rate safety guidance.
What Is the Dog Sodium Deficit Calculator?
Calculate the sodium deficit and correct replacement fluid volume for hyponatraemic dogs — with correction rate safety guidance.
Correcting hyponatraemia too rapidly causes osmotic demyelination syndrome — a devastating neurological complication. This calculator provides the sodium deficit and a safe correction rate.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Sodium deficit = Total Body Water × (desired sodium − current sodium). TBW = 0.6 × body weight in kg. The result gives total mEq of sodium needed. Never correct chronic hyponatraemia faster than 0.5 mEq/L/hr or 10-12 mEq/L per 24 hours — overly rapid correction causes osmotic demyelination syndrome (ODS), also called central pontine myelinolysis, which causes severe and often irreversible neurological damage.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- Merck Veterinary Manual u2014 Clinical Reference — Clinical formulas, normal reference ranges, and diagnostic criteria
- WSAVA Guidelines for Veterinary Practice — International veterinary clinical standards
- Ettinger's Textbook of Veterinary Internal Medicine — Advanced clinical reference for fluid therapy, haematology, and diagnostics
- RECOVER Initiative u2014 CPR Guidelines — Emergency drug dosing and resuscitation protocols
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.