- Levine 2018
PhenoAge Calculator
Estimate your biological age from 9 standard blood biomarkers using the peer-reviewed Levine 2018 formula. Free, no signup.
10 inputsOpen - Insulin Resistance
HOMA-IR Calculator
Calculate Homeostatic Model Assessment for Insulin Resistance from fasting glucose and insulin. Key marker for metabolic health.
2 inputsOpen - Cardiovascular Risk
Triglyceride / HDL Ratio
One of the strongest single-number predictors of insulin resistance and atherogenic dyslipidemia. Often more revealing than LDL alone.
2 inputsOpen - A1C → eAG
A1C to Blood Sugar
Convert your A1C to estimated average glucose (eAG) in mg/dL and mmol/L, with the full conversion chart from optimal to the diabetes range.
1 inputOpen - Vermeulen 1999
Free Testosterone Calculator
Total testosterone can look normal while the free fraction is low. Calculate free and bioavailable T from total T, SHBG and albumin, plus the free androgen index.
3 inputsOpen - Insulin Resistance
TyG Index Calculator
The triglyceride-glucose index estimates insulin resistance from two values already on your standard panel — no fasting insulin draw needed.
2 inputsOpen - Iron Status
Transferrin Saturation (TSAT)
Ferritin rises with inflammation and can look normal while iron stores are empty. TSAT is the marker that does not. Accepts TIBC, UIBC or transferrin.
2 inputsOpen - Muscle Proxy
Sarcopenia Index
Creatinine comes from muscle, cystatin C does not — so their ratio carries a muscle signal neither marker shows alone. Shown without a false cutoff.
2 inputsOpen - Lp(a) Units
Lp(a) Unit Converter
US labs report mg/dL, most others nmol/L. Converts between them and returns a range, because no exact conversion between the two actually exists.
1 inputOpen - Zone 2 Training
Zone 2 Heart Rate
Get your Zone 2 training band in bpm from your age — the low-intensity zone that builds aerobic base and raises VO2 max with the least fatigue.
1 inputOpen
These tools are educational, not diagnostic. Calculators implement the formulas exactly as published. They do not replace a clinical evaluation. If a result concerns you, talk to a physician.