MayoCalc / Health

Lab Results Interpreter

Enter your blood test values and get plain English explanations. Covers CBC, CMP, Lipid Panel, and Thyroid tests.

Complete Blood Count (CBC)

Red Blood Cells
White Blood Cells
Platelets

Comprehensive Metabolic Panel (CMP)

Blood Sugar
Electrolytes
Kidney Function
Liver Function
Protein

Lipid Panel

Thyroid Panel

Disclaimer: This tool is for general educational and informational purposes only. It does not constitute medical advice, professional diagnosis, or treatment and is not a substitute for consultation with a qualified healthcare provider. No doctor-patient relationship is created by your use of this tool. Results are estimates based on published formulas and population-level data that may not reflect your individual medical circumstances. Neither MayoCalc nor Cook Media Systems assumes any liability or responsibility for damage or injury (including death) to any person arising from the use of any information, results, or content provided by this tool. Always consult your physician or other qualified healthcare provider with any questions about a medical condition. See our full Disclaimer and Terms of Service.

How to Use This Lab Results Interpreter

Select a panel tab above (CBC, CMP, Lipid Panel, or Thyroid), enter the values from your lab report, and click "Interpret My Results." The tool will flag any values outside the standard reference range and provide a plain English explanation of what each result means. You do not need to fill in every field. Just enter the values you have.

What Is a CBC (Complete Blood Count)?

A Complete Blood Count measures the cells circulating in your blood: red blood cells (which carry oxygen), white blood cells (which fight infection), and platelets (which help your blood clot). It is one of the most commonly ordered blood tests and is used to screen for anemia, infections, clotting disorders, and many other conditions. A CBC with differential also breaks down white blood cells into subtypes (neutrophils, lymphocytes, monocytes, eosinophils, and basophils), each of which plays a different role in your immune response.

What Is a CMP (Comprehensive Metabolic Panel)?

A Comprehensive Metabolic Panel measures 14 substances in your blood that provide information about your blood sugar, electrolyte balance, kidney function, and liver health. It includes glucose, sodium, potassium, chloride, bicarbonate, calcium, BUN, creatinine, eGFR, ALT, AST, ALP, bilirubin, total protein, albumin, and globulin. It is a standard part of most annual physicals and wellness checkups.

What Is a Lipid Panel?

A Lipid Panel measures the fats and cholesterol in your blood to assess your risk for heart disease and stroke. It typically includes total cholesterol, LDL ("bad") cholesterol, HDL ("good") cholesterol, triglycerides, and VLDL cholesterol. A fasting lipid panel (no food for 9-12 hours before the blood draw) gives the most accurate results, especially for triglycerides.

What Is a Thyroid Panel?

A Thyroid Panel evaluates how well your thyroid gland is working. The thyroid regulates metabolism, energy, heart rate, and body temperature. The most important test is TSH (thyroid stimulating hormone), which acts as a sensitive signal. If TSH is abnormal, Free T4 and Free T3 help clarify whether the thyroid is overactive (hyperthyroidism) or underactive (hypothyroidism).

Understanding Reference Ranges

Reference ranges represent the values found in 95% of healthy adults. Your specific lab may report slightly different ranges depending on the equipment and methods used. Always compare your results to the reference range printed on your own lab report. Values slightly outside the range are not always cause for alarm, and values within the range do not always guarantee perfect health. Context matters, which is why discussing your results with your healthcare provider is important.

Important: This tool is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Lab values must be interpreted in the context of your complete medical history, symptoms, medications, and other test results. Always consult your healthcare provider about your lab results.

Lab Results Interpreter FAQ

What panels does this interpreter cover?
This tool covers four commonly ordered blood panels: Complete Blood Count (CBC) with differential, Comprehensive Metabolic Panel (CMP), Lipid Panel, and Thyroid Panel. Together these represent the most frequently ordered tests during routine wellness visits.
Do I need to enter every value?
No. You can enter as many or as few values as you have. The tool will only interpret the fields you fill in. Leave the rest blank and they will be ignored.
Why do my lab's reference ranges look different?
Reference ranges can vary between laboratories based on the equipment, reagents, and testing methods they use. Some ranges also differ by age and sex. Always compare your results to the ranges printed on your specific lab report. This tool uses standard adult reference ranges commonly reported by major U.S. laboratories.
Can this tool diagnose a medical condition?
No. This tool provides general educational information about what abnormal values may indicate. A single lab value does not diagnose a condition. Your doctor considers your full medical history, symptoms, medications, and additional tests before making any diagnosis.
What does "flagged" mean?
A flagged value falls outside the standard reference range, either higher or lower than expected. Flagged results are not always a sign of disease. Mild abnormalities can result from dehydration, recent meals, medications, or normal variation. Discuss any flagged results with your healthcare provider for proper evaluation.

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Understanding Your Lab Numbers

Lab reports are full of abbreviations and reference ranges that mean nothing to most patients. This interpreter covers the four most common panels: CBC (complete blood count), CMP (comprehensive metabolic panel), lipid panel (cholesterol), and thyroid (TSH, T3, T4). Enter your values and get plain-language explanations of what each number means.

A few things this tool can't replace: your doctor's interpretation of results in the context of your full medical history, trending over time (one abnormal value often means nothing; a trend matters), and the nuance of borderline results. Use this as a starting point for understanding your labs, not as a diagnosis. For a deeper walkthrough, see our guide on reading blood test results.