Health & Fitness Calculators

BMI, TDEE, body fat, pregnancy, heart rate zones, blood pressure metrics, kidney function, and 60+ more health tools using evidence-based formulas.

74 calculators in this category

Every health calculator on this page uses a peer-reviewed formula or clinically accepted standard — Mifflin-St Jeor for BMR, Harris-Benedict for TDEE, US Navy circumference method for body fat, Friedewald equation for LDL cholesterol, CKD-EPI 2021 for eGFR, Karvonen for heart rate zones, Naegele's rule for pregnancy due dates. The math is shown alongside the result so you can verify and learn, not just trust the number. These tools are for educational use — talk to a licensed healthcare provider before making medical decisions.

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⚖️BMI Adults
HEALTH

Online BMI Calculator (Adults)

Calculate your Body Mass Index (BMI) for adults. Get your BMI category, health risk level, and personalized recommendations. Free, instant, no signup.

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💉GLP-1
HEALTH

GLP-1 Weight Loss Calculator (Ozempic / Wegovy / Mounjaro / Zepbound)

Project weight loss on Wegovy, Ozempic, Mounjaro, Zepbound, and Saxenda using STEP and SURMOUNT trial data. Monthly BMI trajectory and side effects.

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🔥Calories / TDEE
HEALTH

Calorie, BMR & TDEE Calculator

Calculate daily calorie needs, Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE) from your body data and activity level. Includes macros.

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🏃Calorie Deficit
HEALTH

Calorie Deficit Calculator (Diet)

Calculate your daily calorie target for weight loss. Includes weekly weight loss projections.

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🤱Pregnancy
HEALTH

Pregnancy Due Date Calculator

Calculate gestational age, estimated due date (EDD), and fetal development milestones based on your last menstrual period (LMP).

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💪1RM
HEALTH

One Rep Max Calculator (1RM)

Estimate your one-rep max from a sub-max set. Compares Epley, Brzycki, Lander, Lombardi, Mayhew, O'Conner, and Wathan formulas.

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🍺BAC
HEALTH

BAC Calculator (Blood Alcohol Content)

Estimate Blood Alcohol Content from drinks using the Widmark formula. See US legal driving thresholds and hours until BAC reaches 0.00.

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🏃Running Pace
HEALTH

Running Pace Calculator

Calculate running pace, finish time, or distance. Includes training zones (easy, tempo, threshold, interval) and race predictions.

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❤️‍🩹ASCVD
HEALTH

ASCVD Risk Calculator

Estimate 10-year heart attack and stroke risk using ACC/AHA Pooled Cohort Equations. Guides who benefits from statin therapy.

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All Health & Fitness Calculators

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