The normal range for electrolytes can vary slightly depending on the lab doing the test and the methodology used, but here's a general guideline for common electrolytes in adults:
Potassium: 3.7 to 5.1 mmol/L
Sodium: 136 to 144 mmol/L
Chloride: 97 to 105 mmol/L
Calcium: 8.5 to 10.2 mg/dL in adults
Magnesium: 1.7 to 2.2 mg/dL
Bicarbonate: 22 to 30 mmol/L
Phosphate: 2.5 to 4.8 mg/dL