💧 Maintenance Fluid (Holliday-Segar)
Daily maintenance fluid volume and hourly rate by weight using the Holliday-Segar 4-2-1 / 100-50-20 method. Instant, browser-side.
Maintenance Fluid (Holliday-Segar)
Weight (kg)
When to use
Estimate baseline maintenance fluids; adjust for fever, ongoing losses and cardiac/renal function.
How it works
Hourly = first 10 kg × 4 + next 10 kg × 2 + remainder × 1 mL/kg/h; daily = 100/50/20 mL/kg/day by the same bands.
Key points
- This is a baseline maintenance estimate only.
- Add for fever and ongoing fluid losses.
- Reduce with cardiac or renal impairment.
- Titrate to intake/output and the clinical picture.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.