Free blood test calculators

Quick, private calculators for the numbers people ask about most. Enter your values and get a plain-English result based on published clinical guidelines. Then, when you want the whole picture, upload your full test.

Cholesterol Ratio Calculator

Your total-to-HDL ratio, one of the clearest single signals of heart risk. See if yours is optimal, moderate, or high.

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Non-HDL Cholesterol Calculator

All your "bad" cholesterol in one number, a marker many guidelines now prefer over LDL alone.

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eGFR Calculator

Estimate kidney function with the race-free CKD-EPI 2021 equation and see your stage.

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Total Cholesterol to HDL Ratio Calculator

The most quoted lipid ratio, and the one most often printed on a cardiovascular risk report.

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LDL to HDL Ratio Calculator

Your LDL divided by the HDL that counterweights it, which says more than either alone.

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Triglyceride to HDL Ratio Calculator

A widely cited screening proxy for insulin resistance, from two numbers already on your lipid panel.

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Remnant Cholesterol Calculator

The cholesterol your panel does not print: what is left once LDL and HDL come out of the total.

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Friedewald LDL Calculator

How most laboratories arrive at your LDL. They do not measure it, they calculate it.

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TyG Index Calculator

The triglyceride-glucose index, studied widely as an insulin resistance surrogate.

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HOMA-IR Calculator

The standard homeostatic estimate of insulin resistance, from fasting glucose and insulin.

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A1c to Average Glucose Calculator

Your HbA1c as a number you can picture: the average glucose it represents.

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FIB-4 Index Calculator

A validated non-invasive score for whether liver fibrosis is unlikely enough to stop looking.

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AST to ALT Ratio Calculator

The De Ritis ratio. Two liver enzymes are more informative divided by each other.

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Transferrin Saturation Calculator

How full your iron transport is, and the number that often catches what ferritin misses.

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BUN to Creatinine Ratio Calculator

Whether a raised creatinine is about the kidney itself or about something upstream of it.

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Albumin to Globulin Ratio Calculator

Your total protein split into its two halves, and the ratio between them.

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Neutrophil to Lymphocyte Ratio Calculator

A widely studied inflammation marker hiding inside a standard blood count.

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Anion Gap Calculator

The unmeasured charge in your electrolytes, from sodium, chloride and bicarbonate.

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Corrected Calcium Calculator

Most calcium travels bound to albumin. If albumin is low, calcium reads low with it.

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Free T3 to Free T4 Ratio Calculator

How well the storage thyroid hormone is converting to the active one. TSH says nothing about this.

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Uric Acid to Creatinine Ratio Calculator

Uric acid read against kidney clearance rather than on its own.

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One number is never the whole story

BloodMarker reads your entire blood test at once, explains how your markers interact, and tracks them over time so you can watch them improve.

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These calculators are for education only and are not medical advice or a diagnosis. Always discuss your results with a qualified healthcare professional. Provided by the BloodMarker Team · contact@bloodmarker.com