Blood Pressure Category Calculator
Classify your blood pressure reading using AHA guidelines. See color-coded risk levels from Normal to Hypertensive Crisis with lifestyle recommendations.
Free Vitals & Lab Values Calculators
8 toolsBlood pressure, blood sugar, cholesterol, and spirometry calculators. Browse our free vitals & lab values tools below — no sign-up required.
Blood Sugar Converter
Convert blood sugar levels between mg/dL and mmol/L. View normal, prediabetic, and diabetic ranges with color-coded classifications.
Cholesterol Ratio Calculator
Calculate total cholesterol to HDL ratio and non-HDL cholesterol, then review those results as adjunct lipid markers alongside the rest of the panel.
HbA1c to Average Glucose Calculator
Convert HbA1c percentage to estimated average glucose (eAG) in mg/dL and mmol/L using the ADAG study formula. Classify your A1c level.
LDL/HDL Ratio Calculator
Calculate your LDL to HDL cholesterol ratio and review it as a descriptive lipid-balance marker alongside the rest of the lipid panel.
Peak Flow Percentage Calculator
Calculate peak expiratory flow (PEF) as a percentage of predicted or personal-best values and place the result into the usual Green/Yellow/Red monitoring zones.
Spirometry Predicted Value Calculator
Calculate predicted FEV1, FVC, and FEV1/FVC values from reference equations and compare measured results against those predicted values.
Triglyceride/HDL Ratio Calculator
Calculate the triglyceride-to-HDL cholesterol ratio and use it as a rough lipid-pattern marker alongside the rest of the lipid panel.