Normal Level of Sodium, Potassium, Calcium and Phosphorus in Blood.

Normal Blood Levels:

• Sodium (Na⁺): 135 – 145 mEq/L

• Potassium (K⁺): 3.5 – 5.0 mEq/L

• Calcium (Ca²⁺, total): 8.5 – 10.5 mg/dL (2.12 – 2.62 mmol/L)

• Phosphorus (PO₄³⁻): 2.5 – 4.5 mg/dL (0.81 – 1.45 mmol/L)