MedCalcHub stores your favorites, history, and saved calculations locally in your browser using localStorage. This data never leaves your device.
Optional advertising, when enabled, may use third-party cookies or similar technologies. You can accept or reject advertising below.
12 calculators
Metabolic and endocrine calculators for glycaemic estimation, insulin resistance assessment, thyroid hormone dosing, and steroid equivalence conversion. Key tools include the HOMA-IR and HOMA-B calculators for insulin resistance and beta-cell function, QUICKI for insulin sensitivity, estimated average glucose from HbA1c, and the free thyroxine index. The levothyroxine dose calculator supports thyroid replacement planning, while the adrenal steroid converter provides approximate dose equivalences between common glucocorticoids. Metabolic syndrome screening (ATP III criteria) and atherogenic risk markers (TyG index, TG/HDL ratio, triglyceride-HDL ratio) round out the category. These calculators are adjuncts to clinical judgement — insulin resistance indices have limited validation in type 1 diabetes, and steroid equivalents are approximations that depend on indication and route.
Every tool in this domain is linked below, each with its own formula, inputs, and interpretation notes. Starting from the clinical area instead of the subject? The same calculators are grouped on the specialties pages, the full alphabetical list collects everything in one place, and the comparison tool lines up three tools side by side.
Estimates insulin resistance from fasting plasma glucose and fasting serum insulin using the Homeostasis Model Assessment (HOMA) equation.
EndocrinologyEstimates pancreatic beta-cell function from fasting plasma glucose and fasting serum insulin using the HOMA equation.
EndocrinologyProvides a simple estimate of insulin sensitivity as the reciprocal of HOMA-IR.
EndocrinologyEstimates mean plasma glucose from HbA1c using the ADAG formula validated by the American Diabetes Association.
EndocrinologyCalculates the triglyceride-glucose (TyG) index, a surrogate marker of insulin resistance derived from fasting triglycerides and fasting plasma glucose: TyG = ln(TG × FPG / 2) with units in mg/dL. Elevated values indicate greater insulin resistance and higher cardiometabolic risk.
EndocrinologyCalculates the ratio of fasting triglycerides to HDL cholesterol. A ratio ≥ 3.0 (mg/dL units) has been used as a marker of insulin resistance in overweight non-diabetic adults. The predictive value is ethnicity-dependent and is not reliable in African American populations.
EndocrinologyCalculates QUICKI, an index of insulin sensitivity derived from fasting insulin and fasting glucose: QUICKI = 1 / (log10 fasting insulin [µU/mL] + log10 fasting glucose [mg/dL]). Lower values indicate greater insulin resistance; the index is primarily a research and screening tool.
EndocrinologyCorrects the QT interval for heart rate using the Bazett formula.
EndocrinologyEstimates the approximate full-replacement levothyroxine dose for adults using ~1.6 µg/kg/day (FDA levothyroxine labeling). It is NOT a universal prescribing dose calculator: the actual starting dose depends on age, duration and severity of hypothyroidism, cardiovascular status, pregnancy status, residual thyroid function, and clinical/laboratory findings.
EndocrinologyConverts between equivalent glucocorticoid and mineralocorticoid doses of commonly used adrenal steroids.
EndocrinologyCalculates the free thyroxine index (FTI or T7) from total T4 and the T3 resin uptake, an indirect estimate of free thyroid hormone used when direct free T4 assays are unavailable or when binding-protein status is in question.
EndocrinologyAssesses metabolic syndrome using the updated NCEP ATP III criteria, which require at least 3 of 5 components: elevated waist circumference, elevated triglycerides (or treatment), reduced HDL (or treatment), elevated blood pressure (or treatment), and elevated fasting glucose (or treatment).
Endocrinology