Normal Lab Values Reference
Vital Signs
Blood Pressure
Systolic ~120 mmHg / Diastolic ~80 mmHg
Heart Rate (HR)
60 – 100 bpm
Respirations (RR)
12 – 20 breaths/min
O2 Saturation (SpO2)
95 – 100%
Temperature
97.8 – 99 °F (36.5 – 37.2 °C)
Basic Metabolic Panel (BMP)
Sodium (Na)
135 – 145 mEq/L
Potassium (K)
3.5 – 5.0 mEq/L
Chloride (Cl)
95 – 105 mEq/L
Calcium (Ca)
9 – 11 mg/dL
BUN (Blood Urea Nitrogen)
7 – 20 mg/dL
Creatinine (Cr)
0.6 – 1.2 mg/dL
Glucose (Fasting)
70 – 99 mg/dL
CO2 (Bicarbonate)
22 – 29 mEq/L
Albumin
3.4 – 5.4 g/dL
Total Protein
6.2 – 8.2 g/dL
Complete Blood Count (CBC)
WBC (White Blood Cells)
4,500 – 11,000 /µL
RBC (Red Blood Cells)
F: 4.2 – 5.2 ×106/µL, M: 4.7 – 6.1 ×106/µL
Hemoglobin (Hgb)
F: 12 – 16 g/dL, M: 13 – 18 g/dL
Hematocrit (Hct)
F: 36 – 48%, M: 39 – 54%
Platelets (Plt)
150,000 – 450,000 /µL
Coagulation (Coags)
PT (Prothrombin Time)
~10 – 13 seconds (varies)
aPTT (Activated Partial Thromboplastin Time)
25 – 35 seconds (therapeutic on Heparin ~1.5 – 2× control)
INR (International Normalized Ratio)
Not on Warfarin: ~0.8 – 1.2, On Warfarin (therapeutic): 2 – 3
D-Dimer
< 0.5 mg/L (lab-dependent)
Fibrinogen
200 – 400 mg/dL
Additional Common Labs
Liver Function Tests (LFTs)
AST (Aspartate Aminotransferase)
10 – 40 U/L
ALT (Alanine Aminotransferase)
7 – 56 U/L
ALP (Alkaline Phosphatase)
40 – 130 U/L
Total Bilirubin
0.3 – 1.2 mg/dL
Direct (Conjugated) Bilirubin
0.0 – 0.3 mg/dL
Lipid Panel
Total Cholesterol
< 200 mg/dL
LDL (Low-Density Lipoprotein)
< 100 mg/dL (optimal)
HDL (High-Density Lipoprotein)
> 40 mg/dL (men), > 50 mg/dL (women)
Triglycerides
< 150 mg/dL
Arterial Blood Gases (ABG)
pH
7.35 – 7.45
PaCO2
35 – 45 mmHg
PaO2
80 – 100 mmHg
HCO3
22 – 26 mEq/L
SaO2
> 95%
Note: Reference ranges vary by lab and patient population. Always check local lab guidelines.