Health & Fitness Calculators
Calculate BMI, calorie needs, macronutrient ratios, ideal weight ranges, and fitness metrics for health optimization.
42 calculators available
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Showing 42 of 42 calculators
Top Picks in Health & Fitness Calculators
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- BMR & TDEE CalculatorCalculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to understand your daily calorie needs. Accurate metabolic calculator using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. Perfect for weight loss, muscle gain, or maintenance goals.Open tool
- Calorie & Macro CalculatorCalculate your daily calorie needs and macronutrient targets (protein, carbs, fats) for weight loss, muscle gain, or maintenance. Personalized nutrition calculator with multiple diet options including balanced, low-carb, high-protein, and keto. Perfect for meal planning and fitness goals.Open tool
- Water Intake TrackerA simple tool to log and track your daily water consumption to ensure you stay hydrated.Open tool
All Health & Fitness Calculators
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- Age CalculatorAge - Calculate your health metrics and get insights for better wellness.Open tool
- Apgar Score CalculatorApgar Score - Calculate your health metrics and get insights for better wellness.Open tool
- Biological Age CalculatorBiological Age - Calculate your health metrics and get insights for better wellness.Open tool
- Blood Alcohol Content CalculatorBlood Alcohol Content - Calculate your health metrics and get insights for better wellness.Open tool
- Blood Pressure Category CalculatorBlood Pressure Category - Calculate your health metrics and get insights for better wellness.Open tool
- BMI CalculatorCalculate your Body Mass Index (BMI) and learn about your weight category and health recommendations.Open tool
- Body Fat CalculatorCalculate your body fat percentage using the US Navy method. Requires simple circumference measurements and provides accurate body composition analysis.Open tool
- Body Surface Area CalculatorCalculate your body surface area (BSA) using height and weight for medical dosage calculations and physiological assessments.Open tool
- Caffeine Half Life CalculatorCaffeine Half Life - Calculate your health metrics and get insights for better wellness.Open tool
- Cardiovascular Risk CalculatorCardiovascular Risk - Calculate your health metrics and get insights for better wellness.Open tool
- Creatinine Clearance CalculatorCreatinine Clearance - Calculate your health metrics and get insights for better wellness.Open tool
- Diabetes Risk CalculatorDiabetes Risk - Calculate your health metrics and get insights for better wellness.Open tool
- Due Date CalculatorDue Date - Calculate your health metrics and get insights for better wellness.Open tool
- Fertility Window CalculatorFertility Window - Calculate your health metrics and get insights for better wellness.Open tool
- Glycemic Load CalculatorGlycemic Load - Calculate your health metrics and get insights for better wellness.Open tool
- Heart Rate Zone CalculatorCalculate your target heart rate zones for optimal training. Find the right intensity for fat burning, cardio, and maximum performance.Open tool
- Ideal Body Weight CalculatorCalculate your ideal body weight using multiple scientific formulas including Robinson, Miller, Devine, and Hamwi methods.Open tool
- IV Drip Rate CalculatorIV Drip Rate - Calculate your health metrics and get insights for better wellness.Open tool
- Lean Body Mass CalculatorCalculate your lean body mass (LBM) and muscle mass using multiple scientific formulas including Boer, James, and Hume methods. Essential for tracking muscle gain, body composition, and protein requirements. Accurate calculator for bodybuilders, athletes, and fitness enthusiasts.Open tool
- Life Expectancy CalculatorLife Expectancy - Calculate your health metrics and get insights for better wellness.Open tool
- Meal PlannerBuild a seven-day meal plan and automatically organize its ingredients into a shopping list.Open tool
- Meal Timing CalculatorMeal Timing - Calculate your health metrics and get insights for better wellness.Open tool
- Medication Dosage CalculatorMedication Dosage - Calculate your health metrics and get insights for better wellness.Open tool
- Mood JournalRecord mood, energy, activities, and private notes while reviewing your recent entries.Open tool
- One Rep Max CalculatorCalculate your one-repetition maximum (1RM) for any lift including bench press, squat, deadlift, and more. Estimate maximum strength based on weight and reps using proven formulas (Epley, Brzycki, Lander). Get personalized training zones for power, strength, hypertrophy, and endurance.Open tool
- Osteoporosis Risk CalculatorOsteoporosis Risk - Calculate your health metrics and get insights for better wellness.Open tool
- Ovulation CalculatorOvulation - Calculate your health metrics and get insights for better wellness.Open tool
- Pain Scale Tracker CalculatorPain Scale Tracker - Calculate your health metrics and get insights for better wellness.Open tool
- Pregnancy Weight Gain CalculatorPregnancy Weight Gain - Calculate your health metrics and get insights for better wellness.Open tool
- Protein Intake CalculatorCalculate your optimal daily protein needs based on your body weight, fitness goals, age, and activity level. Get personalized protein targets for muscle gain, fat loss, weight maintenance, or athletic performance. Includes protein-rich food examples and timing recommendations.Open tool
- Recipe ManagerSave, search, and organize recipes with ingredients, instructions, servings, and preparation time.Open tool
- Sleep Cycle CalculatorSleep - Calculate your health metrics and get insights for better wellness.Open tool
- Sleep LogTrack your sleep patterns, quality, and duration to improve your rest and overall wellness.Open tool
- Smoking Cost CalculatorSmoking Cost - Calculate your health metrics and get insights for better wellness.Open tool
- Target Heart Rate CalculatorTarget Heart Rate - Calculate your health metrics and get insights for better wellness.Open tool
- VO2 Max CalculatorCalculate your VO2 max, the gold standard measure of cardiovascular fitness and aerobic capacity. Estimate maximal oxygen uptake using multiple field tests including Cooper 12-minute run, Rockport 1-mile walk, and non-exercise methods. Essential for runners, athletes, and endurance training.Open tool
- Waist-to-Hip Ratio CalculatorWaist To Hip Ratio Whr - Calculate your health metrics and get insights for better wellness.Open tool
- Water Intake CalculatorCalculate your daily water intake recommendation based on your weight and activity level. Stay properly hydrated for optimal health.Open tool
- Workout LoggerLog exercises, duration, sets, reps, and notes while reviewing your recent workout history.Open tool
Free health and fitness calculators
Explore 42 free online health calculators for BMI, calorie and macro needs, body composition, heart rate zones, pregnancy dates, hydration, and fitness performance. Choose metric or US units where available and review the assumptions shown with each estimate.
Health calculator results are informational estimates, not diagnoses or individualized treatment advice. Measurements, equations, age ranges, pregnancy circumstances, medications, and medical conditions can affect interpretation; discuss personal health decisions with a qualified healthcare professional.
Popular health calculators
Start with common tools for body measurements, nutrition, pregnancy, and exercise.
- BMI CalculatorCalculate body mass index and view the standard adult BMI range.
- BMR & TDEE CalculatorEstimate resting metabolism and total daily energy expenditure.
- Calorie & Macro CalculatorEstimate daily calories and protein, carbohydrate, and fat targets.
- Body Fat CalculatorEstimate body fat percentage using common measurement methods.
- Due Date CalculatorEstimate pregnancy milestones and an expected due date.
- Heart Rate Zone CalculatorEstimate training zones using age or heart-rate reserve.
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Dedicated landing pages for common calculator topics in health & fitness calculators.
Frequently asked questions
What can I calculate with Health & Fitness Calculators?
Calculate BMI, calorie needs, macronutrient ratios, ideal weight ranges, and fitness metrics for health optimization.
Are the Health & Fitness Calculators free to use?
All 42 health & fitness calculators on this site are free, work in your browser, and require no signup or download.
How do I find the right health & fitness calculators?
Use the subcategory filters and search bar on this page to narrow the list, then open the calculator page that matches your task for the tool and a quick guide.