Free calculators for the numbers on a lab report. They run in your browser and send nothing anywhere. Each one explains its formula and where it stops being reliable.
Convert A1c to estimated average glucose in mg/dL or mmol/L, or a CGM average to GMI, and see why your A1c and your CGM don't always agree.
Calculate eGFR from creatinine, age, and sex with the race-free CKD-EPI 2021 equation, add cystatin C if you have it, and see the KDIGO category.
Calculate free and bioavailable testosterone from total testosterone, SHBG, and albumin with the Vermeulen equation, and learn when the result matters.
Calculate HOMA-IR, HOMA-B, and QUICKI from a fasting glucose and insulin, in mg/dL or mmol/L, and see why there is no single normal cutoff.
Convert lab results between US and SI units (mg/dL, mmol/L, ng/mL, nmol/L) with the factor for each test, and see which tests can't be converted.
Calculate LDL from total cholesterol, HDL, and triglycerides with the Friedewald, Martin/Hopkins, and Sampson equations, and see why they can disagree.