Patient Tools
Simple Health Calculators
Quick educational tools that run entirely in your browser. They provide estimates, not diagnoses or treatment decisions.
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BMI & Healthy Weight
Body-mass index with an estimated BMI 18.5–24.9 weight range.
Enter height and weight.
📐
Body Surface Area
Mosteller BSA estimate, commonly used in clinical calculations.
Enter height and weight.
🔥
BMR & Daily Calories
Mifflin–St Jeor estimate with an activity multiplier.
Enter your details.
📏
Waist-to-Height Ratio
A simple measure of central adiposity; interpret alongside overall health risk.
Enter waist and height.
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HbA1c ↔ eAG
Convert HbA1c to estimated average glucose (mg/dL) or reverse.
Enter either HbA1c or eAG.
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Daily Water Estimate
A broad 30–35 mL/kg estimate for healthy adults; individual needs vary.
Enter body weight.
Important: These calculators are educational estimates. Pregnancy, childhood, older age, heart failure, kidney or liver disease, fluid restriction, edema, dialysis, athletic training and acute illness can substantially change interpretation. Never use these tools to alter medicines or prescribed fluid/diet plans without clinical advice.