Fluid Deficit (Dehydration)
Estimated fluid deficit from % dehydration.
⚠ Drug dosing safety notice: Dosing calculations are a decision-support aid only. Always independently verify the dose, concentration, route, and rate against current prescribing information, an institutional pharmacist, and the patient's renal/hepatic function before administration.
RESULT
Fluid Deficit (Dehydration)
What is Fluid Deficit (Dehydration)?
Estimated fluid deficit from % dehydration. Fluid Deficit is intended for use in: Adults.
How to Use the Fluid Deficit Calculator
- Enter Weight in kg.
- Enter Estimated dehydration in %. Clinical estimate: mild ≈3-5%, moderate ≈6-9%, severe ≥10%
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
Clinical Considerations & Limitations
- The percent-dehydration input is itself a clinical estimate (from exam findings or acute weight loss) — the calculator cannot verify its accuracy.
References
- Standard pediatric/adult dehydration estimate: Deficit (mL) = % dehydration × weight (kg) × 10
Frequently Asked Questions
What is Fluid Deficit (Dehydration)?
Estimated fluid deficit from % dehydration.
Who is Fluid Deficit intended for?
Adults. Always confirm applicability to your specific patient before use.
What are the limitations of Fluid Deficit?
The percent-dehydration input is itself a clinical estimate (from exam findings or acute weight loss) — the calculator cannot verify its accuracy.
What formula or reference does Fluid Deficit use?
Standard pediatric/adult dehydration estimate: Deficit (mL) = % dehydration × weight (kg) × 10
Is Fluid Deficit a diagnosis?
No. Fluid Deficit produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
Medical Disclaimer: Medical calculators are provided for informational and educational purposes only. Results should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always verify results with a qualified healthcare professional. Dosing calculations are a decision-support aid only. Always independently verify the dose, concentration, route, and rate against current prescribing information, an institutional pharmacist, and the patient's renal/hepatic function before administration.
