Medical Lab Tests – Lab Values Reference App for iPhone, iPad & Mac

Whether you are rounding on the wards, interpreting results in the emergency department, or studying for exams, knowing your lab values is essential. This guide covers the most commonly ordered panels with reference ranges in both US and SI units — designed as a quick companion to the Medical Lab Tests app.

Complete Blood Count (CBC)

The CBC is one of the most frequently ordered tests in clinical medicine. It evaluates the cellular components of blood and is essential for diagnosing anemia, infection, and hematologic disorders.

Red Blood Cells

  • RBC — Men: 4.5 – 5.5 x1012/L (4.5 – 5.5 M/mcL) | Women: 4.0 – 5.0 x1012/L (4.0 – 5.0 M/mcL)
  • Hemoglobin — Men: 135 – 175 g/L (13.5 – 17.5 g/dL) | Women: 120 – 160 g/L (12.0 – 16.0 g/dL)
  • Hematocrit — Men: 0.39 – 0.50 L/L (38.8 – 50.0%) | Women: 0.35 – 0.45 L/L (34.9 – 44.5%)
  • MCV — 80 – 100 fL
  • MCH — 27 – 33 pg
  • MCHC — 320 – 360 g/L (32.0 – 36.0 g/dL)
  • RDW — 11.5 – 14.5%

White Blood Cells

  • WBC — 4.5 – 11.0 x109/L (4,500 – 11,000 cells/mcL)
  • Neutrophils — 2.0 – 7.5 x109/L (40 – 70%)
  • Lymphocytes — 1.0 – 4.0 x109/L (20 – 40%)
  • Monocytes — 0.2 – 0.8 x109/L (2 – 8%)
  • Eosinophils — 0.04 – 0.4 x109/L (1 – 4%)
  • Basophils — 0.01 – 0.1 x109/L (0.5 – 1%)

Platelets

  • Platelets — 150 – 400 x109/L (150,000 – 400,000 cells/mcL)
  • MPV — 7.5 – 11.5 fL

An elevated WBC may point to infection, inflammation, or a hematologic malignancy. A low hemoglobin with low MCV suggests iron deficiency anemia — one of the most common findings in clinical practice. Medical Lab Tests includes differentials for both high and low values across all of these parameters.

Basic Metabolic Panel (BMP)

The BMP evaluates electrolytes, kidney function, and glucose. It is routinely ordered on admission, in the ED, and for monitoring patients on IV fluids or diuretics.

Electrolytes

  • Sodium — 136 – 145 mmol/L (136 – 145 mEq/L)
  • Potassium — 3.5 – 5.0 mmol/L (3.5 – 5.0 mEq/L)
  • Chloride — 98 – 106 mmol/L (98 – 106 mEq/L)
  • Bicarbonate (CO2) — 23 – 29 mmol/L (23 – 29 mEq/L)
  • Calcium — 2.12 – 2.62 mmol/L (8.5 – 10.5 mg/dL)

Kidney Function

  • BUN — 2.5 – 7.1 mmol/L (7 – 20 mg/dL)
  • Creatinine — 62 – 115 µmol/L (0.7 – 1.3 mg/dL)
  • Glucose (fasting) — 3.9 – 5.6 mmol/L (70 – 100 mg/dL)

Can you recall the differentials for a critically low potassium, or the common causes of an elevated BUN-to-creatinine ratio? These are the kinds of clinical questions that Medical Lab Tests is built to answer — instantly, at the bedside.

Liver Function Tests (LFTs)

LFTs assess hepatocellular injury, cholestasis, and synthetic liver function. They are critical for evaluating jaundice, monitoring drug toxicity, and screening patients with risk factors for liver disease.

Enzymes

  • ALT — 7 – 56 U/L
  • AST — 10 – 40 U/L
  • ALP — 44 – 147 U/L
  • GGT — Men: 8 – 61 U/L | Women: 5 – 36 U/L

Bilirubin & Proteins

  • Total Bilirubin — 1.7 – 20.5 µmol/L (0.1 – 1.2 mg/dL)
  • Direct Bilirubin — 0 – 5.1 µmol/L (0 – 0.3 mg/dL)
  • Albumin — 35 – 55 g/L (3.5 – 5.5 g/dL)
  • Total Protein — 60 – 83 g/L (6.0 – 8.3 g/dL)

Coagulation Studies

  • PT — 11 – 13.5 seconds
  • INR — 0.8 – 1.1 (therapeutic on warfarin: 2.0 – 3.0)
  • aPTT — 25 – 35 seconds
  • Fibrinogen — 2.0 – 4.0 g/L (200 – 400 mg/dL)
  • D-dimer — < 0.50 mg/L (< 500 ng/mL)

Thyroid Function

  • TSH — 0.4 – 4.0 mIU/L
  • Free T4 — 10 – 23 pmol/L (0.8 – 1.8 ng/dL)
  • Free T3 — 3.5 – 6.5 pmol/L (2.3 – 4.2 pg/mL)

Lipid Panel

  • Total Cholesterol — < 5.2 mmol/L (< 200 mg/dL) desirable
  • LDL — < 2.6 mmol/L (< 100 mg/dL) optimal
  • HDL — > 1.0 mmol/L (> 40 mg/dL) men | > 1.3 mmol/L (> 50 mg/dL) women
  • Triglycerides — < 1.7 mmol/L (< 150 mg/dL)

Looking Up Lab Values on the Go

Reference ranges are only part of the picture. Understanding what an abnormal value means clinically — the differentials, the next steps — is what matters at the bedside. That is exactly what Medical Lab Tests is designed for.

Rated #1 Lab Values Application by iMedicalApps.com, Medical Lab Tests covers hundreds of laboratory tests with reference ranges in both US and SI units, differential diagnoses for high and low values, and high-yield clinical information focused on ward-based decision making.

The reference ranges in this article are general guidelines for adults. Ranges may vary between laboratories. Always consult your healthcare provider or laboratory for facility-specific ranges. This content is for educational purposes and is not a substitute for professional medical advice.

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