Free tools for reading your own bloodwork

Calculators that take the numbers on your lab report and show what they work out to, with the source each one comes from.

• Free testosterone calculator · Vermeulen, from total testosterone, SHBG and albumin - with the source it comes from.
• Testosterone to estradiol ratio · T:E2 in all three conventions, so you can tell which number you are looking at.
• DHT to estradiol ratio · DHT:E2, with the unit convention it was divided in stated on the page.
• Free androgen index (FAI) · 100 x total testosterone over SHBG, both converted to nmol/L first.
• Free T3 to free T4 ratio · FT3:FT4 in pmol/L, the form the thyroid literature uses, and as printed.
• HOMA-IR calculator · Fasting glucose and fasting insulin, with the 1985 paper the model comes from.
• Blood test glossary · What each marker on a lab report measures, what it is usually read alongside, and what changes the number.
• Reference ranges, by lab · What Mayo Clinic, Labcorp and Quest each state, for which population and method, with the source linked.