Free blood test tools

• mg/dL to mmol/L converter

  Glucose, cholesterol, triglycerides, uric acid and creatinine. Each substance uses its own factor — this applies the right one.

• HbA1c to average glucose

  Convert HbA1c to estimated average glucose in mg/dL and mmol/L, plus IFCC mmol/mol, using the ADAG equation.

• HOMA-IR calculator

  The insulin-resistance score from fasting insulin and glucose. Catches the compensation phase years before glucose moves.

• Triglyceride to HDL ratio

  A free insulin-resistance signal hiding in any standard lipid panel. No extra test needed.

• Non-HDL cholesterol calculator

  One subtraction that captures every artery-damaging particle, not just LDL — and stays reliable when triglycerides are high.

• Ferritin checker: normal vs optimal

  See where your ferritin sits between the lab's floor and the level clinicians call adequate. The gap is where symptoms hide.

Why these six

Each one answers a question that comes up constantly and that a lab report doesn't address. Reference ranges are printed in whatever unit the laboratory uses, derived values like HOMA-IR and non-HDL are never calculated for you, and the difference between a range being normal and a result being adequate is left entirely unexplained.

They also share a limitation worth stating plainly: a calculator answers a question about one moment. Almost everything useful in blood work lives in the comparison across time — the same marker, measured repeatedly, in a consistent unit. That is the part these tools can't do, and it's why reading results properly means keeping them rather than converting them once and moving on.

Guides that go deeper

• How to read blood test results without a medical degree
• TSH levels by number — look up your exact result
• How to know if you have insulin resistance
• What your cholesterol numbers actually mean
• Ferritin levels chart: normal vs optimal
• HbA1c explained

These tools are for education and aren't medical advice. Reference ranges vary between laboratories — check the range printed on your own report, and discuss your results with a qualified clinician.