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.
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.
Most Popular
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.
Open Calculator →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.
Open Calculator →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.
Open Calculator →Calorie Deficit Calculator (Diet)
Calculate your daily calorie target for weight loss. Includes weekly weight loss projections.
Open Calculator →Pregnancy Due Date Calculator
Calculate gestational age, estimated due date (EDD), and fetal development milestones based on your last menstrual period (LMP).
Open Calculator →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.
Open Calculator →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.
Open Calculator →Running Pace Calculator
Calculate running pace, finish time, or distance. Includes training zones (easy, tempo, threshold, interval) and race predictions.
Open Calculator →ASCVD Risk Calculator
Estimate 10-year heart attack and stroke risk using ACC/AHA Pooled Cohort Equations. Guides who benefits from statin therapy.
Open Calculator →All Health & Fitness Calculators
- Conception🤰
- A1C🩸
- Chronological Age🎂
- CrCl🩺
- Peptide💉
- Weight Loss⚖️
- Macros🥗
- Caffeine☕
- Water Intake💧
- Max Heart Rate❤️
- Zone 2 Training❤️
- Longevity Score🧬
- Visceral Fat🫀
- Fitness Age🏃
- GLP-1 Results💉
- Medicaid Eligibility🩺
- ACA Subsidy❤️🩹
- GLP-1 Cost💉
- CKD-EPI eGFR🧪
- TDEE Zigzag🔀
- Weight Percentile📊
- Anion Gap⚗️
- LDL🫀
- Trimester🤰
- Baby Formula🍼
- Corrected Age👶
- MAP🩸
- Pulse Pressure❤️
- Standard Drinks🍺
- Pack Years🚭
- DOTS🏆
- Wilks🏋️
- BSA🩺
- BMR🔥
- WHtR📏
- Army Body Fat🪖
- Lean Mass💪
- Target HR❤️
- Body Recomp💪
- Sleep Coach🌙
- AQI🌫️
- IF⏰
- Metabolic🩺
- Biological Age⏳
- HRV💓
- Child Nutrition🧒
- Walking🚶
- Sleep😴
- Dosage💊
- Blood Sugar🩸
- Blood Pressure🩺
- Ovulation🥚
- Pregnancy USG🩺
- Ideal Weight⚖️
- Pregnancy BMI🤰
- eGFR🫘
- Baby Weight👶
- Protein🥩
- Body Fat🏋️
- Menstrual Cycle🩸
- Stunting👶
- Genetic Height📏
- Mental Health🧠
- BMI Children👶
- Fertility Window🤰
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