liminfoLab Values Reference
Free web tool: Lab Values Reference
| Test | Normal Range | Unit | Clinical Significance |
|---|---|---|---|
| WBC | 4.5-11.0 | K/uL | Infection, leukemia, immune status |
| RBC (Male) | 4.7-6.1 | M/uL | Anemia, polycythemia |
| RBC (Female) | 4.2-5.4 | M/uL | Anemia, polycythemia |
| Hemoglobin (Male) | 14-18 | g/dL | Key indicator for anemia diagnosis |
| Hemoglobin (Female) | 12-16 | g/dL | Key indicator for anemia diagnosis |
| Hematocrit (Male) | 42-52 | % | RBC proportion in blood |
| Hematocrit (Female) | 37-47 | % | RBC proportion in blood |
| Platelets | 150-400 | K/uL | Bleeding tendency, thrombosis risk |
| Na (Sodium) | 136-145 | mEq/L | Dehydration, SIADH, adrenal insufficiency |
| K (Potassium) | 3.5-5.0 | mEq/L | Arrhythmia, renal failure, diuretics |
| Cl (Chloride) | 98-106 | mEq/L | Acid-base balance |
| CO2 | 23-29 | mEq/L | Metabolic acidosis/alkalosis |
| BUN | 7-20 | mg/dL | Renal function, dehydration, GI bleeding |
| Creatinine | 0.7-1.3 | mg/dL | Glomerular filtration rate (GFR) estimation |
| Glucose (Fasting) | 70-100 | mg/dL | Diabetes, hypoglycemia |
| Calcium | 8.5-10.5 | mg/dL | Parathyroid, bone metabolism |
| AST (GOT) | 10-40 | U/L | Hepatocellular damage, MI |
| ALT (GPT) | 7-56 | U/L | Hepatocellular damage (liver-specific) |
| ALP | 44-147 | U/L | Biliary obstruction, bone disease |
| Total Bilirubin | 0.1-1.2 | mg/dL | Jaundice, hemolysis, liver disease |
| Albumin | 3.5-5.5 | g/dL | Nutritional status, liver function |
| TSH | 0.4-4.0 | mIU/L | Hypothyroidism/hyperthyroidism |
| PT/INR | 0.8-1.1 | Coagulation function, warfarin monitoring |
About Lab Values Reference
The Lab Values Reference is a comprehensive, searchable table of normal laboratory reference ranges for the most clinically important blood and chemistry tests. It covers Complete Blood Count (CBC) values such as WBC, RBC (sex-differentiated), hemoglobin, hematocrit, and platelets; electrolytes including sodium, potassium, chloride, and bicarbonate; renal function markers BUN and creatinine; liver function tests AST, ALT, ALP, total bilirubin, and albumin; thyroid function (TSH); and coagulation (PT/INR). Each entry lists the normal range, unit, and key clinical significance.
Medical students preparing for USMLE or clinical rotations, nursing professionals verifying results at the bedside, and healthcare educators creating study materials will all benefit from having these reference ranges in a single searchable interface. The search bar lets you find a test by name or by its clinical significance keyword — for example, searching "anemia" returns all tests relevant to anemia diagnosis. Category filter buttons (CBC, Electrolytes, Liver, Renal, Thyroid) let you browse an entire panel at once.
All data is embedded directly in the page and processed entirely in your browser. There is no server query, no login required, and no network request needed after the page loads. The table updates instantly as you type into the search field, making it ideal for quick bedside lookup or exam review. The reference ranges shown reflect widely used adult reference intervals from clinical laboratories.
Key Features
- Covers 23 essential lab tests across CBC, electrolytes, liver function, renal function, thyroid, and coagulation panels
- Sex-differentiated normal ranges for RBC, hemoglobin, and hematocrit (male vs. female values)
- Real-time search by test name or clinical significance keyword (e.g. search "anemia", "arrhythmia", "jaundice")
- Category filter buttons for instant panel-level filtering: CBC, Electrolytes, Liver, Renal, Thyroid
- Clinical significance column explaining what abnormal values may indicate (e.g. BUN elevation → renal failure, dehydration, GI bleeding)
- Reference units displayed for each test (K/uL, M/uL, g/dL, mEq/L, mg/dL, U/L, mIU/L)
- 100% client-side — all data embedded in page, no network requests after load
- Dark mode support and responsive table layout for desktop, tablet, and mobile
Frequently Asked Questions
What lab tests are included in this reference?
The reference includes WBC, RBC (male/female), hemoglobin (male/female), hematocrit (male/female), platelets, PT/INR, sodium, potassium, chloride, CO2, glucose (fasting), calcium, BUN, creatinine, AST, ALT, ALP, total bilirubin, albumin, and TSH — 23 entries in total.
Why are some normal ranges listed separately for males and females?
RBC, hemoglobin, and hematocrit have physiologically different normal ranges between males and females due to differences in red blood cell mass and hormonal factors. The reference lists each separately so you can apply the correct range for your patient.
How do I search for a specific test?
Type the test name or a clinical keyword into the search box at the top. For example, type "ALT" to find the liver-specific transaminase, or type "diabetes" or "hypoglycemia" to find glucose. The table filters instantly as you type.
What does the "Clinical Significance" column mean?
The clinical significance column describes what conditions or clinical scenarios are associated with abnormal values for that test. For example, an elevated creatinine is listed as significant for glomerular filtration rate (GFR) estimation, pointing toward renal impairment.
Are these reference ranges for adults?
Yes. The ranges shown reflect standard adult reference intervals used in most clinical laboratories. Pediatric ranges and pregnancy-adjusted ranges differ and are not included in this reference.
What does PT/INR measure and what is normal?
PT/INR (Prothrombin Time / International Normalized Ratio) measures the extrinsic coagulation pathway. A normal INR is 0.8–1.1 in patients not on anticoagulation. Elevated INR indicates impaired coagulation, liver disease, or therapeutic warfarin effect.
What is the difference between AST and ALT?
Both are liver enzymes, but ALT is more liver-specific — it is found predominantly in hepatocytes. AST is also present in muscle, heart, and other tissues. An isolated AST elevation with normal ALT may suggest myocardial infarction or muscle injury rather than primary liver disease.
Why is TSH used to assess thyroid function rather than T3 or T4?
TSH is the most sensitive first-line test for thyroid dysfunction because it reflects the pituitary's response to circulating thyroid hormone levels. An elevated TSH indicates hypothyroidism; a suppressed TSH indicates hyperthyroidism. T3 and T4 are ordered as confirmatory tests when TSH is abnormal.