Electrolyte Replacement Calculator
Estimate sodium & potassium deficits, replacement fluid volumes, and infusion rates. For clinical education and planning — always verify with local protocols.
Step 1: Patient Information
140 mEq/L
Quick reference
Normal Na: 135–145 mEq/L · Normal K: 3.5–5.0 mEq/L. Water distribution: ~60% of body weight (use 0.6 for deficit calculation).
Step 2: Replacement Settings
1.0x
Deficit formula
Na deficit = (target Na – serum Na) × 0.6 × weight (kg). K deficit ≈ (target K – serum K) × 0.4 × weight. Adjust for ongoing losses.
Estimated Replacement
Summary
Balance Bars
Fluid Comparison
Estimated total deficit (mEq)
210
Na + K combined estimate
Sodium deficit (mEq)
126
Potassium deficit (mEq)
14
Replacement volume (mL)
820
Infusion rate (mL/hr)
68
Electrolyte balance (current vs target)
Serum Na / target
135 / 140
Serum K / target
3.5 / 4.0
Volume status
Moderate deficit
Replacement fluid
0.9% NS
Common IV Fluids Composition
| Fluid | Na (mEq/L) | K (mEq/L) | Cl (mEq/L) | Osmolality |
|---|
Need expert clinical advice?
Always consult local protocols and a physician before administering IV fluids. This tool is for educational purposes.
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