Fluid Deficit Calculator

Name: Fluid Deficit Calculator
Creator: Daniel Diaz-Gil, MD
Keywords: dehydration, fluid deficit, replacement, rehydration, oral rehydration, gastroenteritis, nutrition, pediatric

Calculates dehydration fluid deficit with replacement schedule including maintenance fluids

Clinically Verified· 6 tests

For educational and informational purposes only. Verify all results before clinical application.

Weight *

Estimated Dehydration (%) *

Replacement Period

References

Freedman SB, Adler M, Seshadri R, Powell EC. Oral ondansetron for gastroenteritis in a pediatric emergency department. N Engl J Med. 2006;354(16):1698-1705.[DOI]
AAP Committee on Nutrition. Practice parameter: the management of acute gastroenteritis in young children. Pediatrics. 1996;97(3):424-435.[DOI]

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for general pediatric care

The Harriet Lane HandbookClassic pediatric drug dosing and clinical reference~$50via Amazon Broselow Pediatric Emergency TapeColor-coded length-based tape for weight estimation and emergency dosing~$30via Amazon