Simple, private health calculators
Quick answers to common lab and vital-sign questions — all calculated right in your browser. Nothing you type is sent anywhere or saved.
A1C → Average Glucose
Turn an A1C result into an estimated average glucose (eAG).
Open A1C EstimatorBlood Sugar → A1C
Estimate an approximate A1C from your average glucose.
Open Body Mass IndexBMI Calculator
Find your BMI and its standard weight category.
Open BP CategoryBlood Pressure Checker
See your BP category, explained in plain language.
Open CKD-EPI 2021eGFR / Kidney Function
Estimate kidney function from creatinine, age and sex.
Open Cockcroft-GaultCreatinine Clearance
Estimate from age, weight, creatinine and sex.
Open Heart Risk InfoCholesterol Risk
See your Total:HDL ratio and cardiovascular risk factors.
Open Friedewald LDLLDL Calculator
Calculate LDL from total cholesterol, HDL and triglycerides.
Open Non-HDLNon-HDL Cholesterol
Non-HDL cholesterol from total cholesterol and HDL.
Open Exercise ZonesTarget Heart Rate
Find your moderate and vigorous exercise heart-rate zones.
Open Naegele's RulePregnancy Due Date
Estimate a due date and gestational age from your last period.
Open mg/kg DosingWeight-Based Dose
Calculate a weight-based medication dose (mg/kg).
Open Devine FormulaIdeal Body Weight
Estimate ideal body weight from height and sex.
Open WHtRWaist-to-Height Ratio
A quick central-fat check from waist and height.
Open Weight-BasedChildren's Fever Dosing
Weight-based acetaminophen or ibuprofen dose for a child.
OpenEducational use only. These calculators use standard published formulas but do not replace professional medical advice, diagnosis, or treatment. Always talk with your doctor about your results. If you think you have an emergency, call your local emergency number.