Pediatric dehydration deficit + maintenance
Pediatric dehydration plan (Holliday-Segar 4-2-1): maintenance mL/h, total deficit = % dehydration x kg x 10, and first-8-h / next-16-h rates (maintenance + half deficit each).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Weight
- 12 kg
- Estimated dehydration
- 10 %
Result: Maintenance 44 mL/h; deficit 1200 mL; first 8 h 119 mL/h, next 16 h 81.5 mL/h.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Weight
- Estimated dehydration
How this is calculated
Holliday MA, Segar WE. Pediatrics. 1957;19(5):823-832 (4-2-1 maintenance); deficit (mL) = % dehydration x weight (kg) x 10; half over the first 8 h, half over the next 16 h on top of maintenance. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.