Free health tools, no account needed
Calculators that turn your lab results into plain-language insights — plus a free AI health assessment that maps your symptoms to personalized patterns.
Free Health Assessment
3 minutes, 12 health topics, personalized AI report by email.
Metabolic health calculators
Instant, research-backed scores from the lab values you already have. Free forever, no account needed — with reference ranges and plain-language interpretation.
HOMA-IR Calculator
Estimate insulin resistance from fasting glucose and insulin — includes the QUICKI sensitivity index.
TyG Index Calculator
Combine fasting triglycerides and glucose into a single insulin-resistance marker — no insulin assay needed.
TG/HDL Ratio Calculator
Pull a cardiometabolic risk signal straight from your standard lipid panel.
Waist-to-Height Ratio Calculator
Check central adiposity with just a tape measure — keep your waist to less than half your height.
Metabolic Syndrome Risk Score
Count how many of the five published metabolic syndrome criteria your numbers currently meet.
ApoB/ApoA1 Ratio Calculator
Measure the balance between atherogenic and protective lipoprotein particles from an advanced lipid panel.
Thyroid health calculators
Ratio-based views of your thyroid labs — conversion, axis balance, and the numbers behind the numbers. Free, no account needed.
Thyroid Ratio Calculator
Three ratio views of your thyroid labs in one page: FT3/rT3, FT3/FT4, and Jostel's TSH Index.
Nutrient status tools
Environment- and symptom-based estimators for nutrient status — no lab order required. Free, no account needed.
UVB Vitamin D Synthesis Calculator
Estimate how much midday sun your skin type needs for vitamin D synthesis at today's UV index.
Immune & inflammation calculators
Research-backed composite markers from routine lab values — inflammation and immune context in plain language. Free, no account needed.
hs-CRP:Albumin Ratio Calculator
Combine inflammation and nutritional status into one research-grade composite marker.
Gut health tools
Simple, shareable tools for digestive health — interpret what your body is telling you. Free, no account needed.
Bristol Stool Chart Interpreter
The seven-type chart clinicians actually use — pick what you see, get a plain-language read.
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