Fitness Calculator - 30+ Free Tools
Professional fitness calculators with AI-powered insights. Calculate BMI, calories, macros, body fat, protein needs and more. All calculators are free, accurate, and require no signup.
Body Composition (9)
Measure and track your body metrics
BMI Calculator
Calculate your Body Mass Index to assess your weight category and health risks.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method.
Ideal Weight Calculator
Find your ideal weight range based on height, age, and frame size.
Waist-Hip RatioNew
Calculate your WHR to assess body fat distribution and health risks.
Lean Body MassNew
Calculate your lean muscle mass and fat mass distribution.
Body Surface AreaNew
Calculate BSA for medical and clinical purposes.
Army Body FatNew
U.S. Army body fat calculator with military standards.
Metabolic AgeNew
Calculate your metabolic age based on BMR and body composition.
Pregnancy Weight GainNew
Track healthy pregnancy weight gain with trimester-specific guidance.
Nutrition & Diet (12)
Plan your nutrition and calorie intake
TDEE Calculator
Calculate your Total Daily Energy Expenditure for maintenance calories.
Calorie Calculator
Determine daily calorie needs for weight loss, maintenance, or muscle gain.
BMR Calculator
Calculate your Basal Metabolic Rate - calories burned at rest.
Macro Calculator
Calculate optimal protein, carbs, and fat intake for your goals.
Protein Calculator
Find your daily protein needs based on weight and activity level.
Water Intake Calculator
Calculate daily water intake needs based on weight and activity.
Keto Macro CalculatorNew
Calculate keto-specific macros for ketogenic diet success.
Intermittent FastingNew
Calculate optimal fasting windows for IF protocols.
Carb CyclingNew
Plan high, medium, and low carb days for your training.
Meal TimingNew
Calculate optimal meal timing around workouts and sleep.
Calories BurnedNew
Calculate calories burned for 100+ activities and exercises.
Steps to CaloriesNew
Convert daily steps to calories burned and distance covered.
Strength Training (6)
Calculate strength metrics and track progress
One Rep Max
Estimate your one-rep max for strength training programming.
Wilks ScoreNew
Compare your strength across different bodyweight classes.
Bench Press MaxNew
Calculate your bench press 1RM and training percentages.
Squat MaxNew
Calculate your squat 1RM with strength standards by bodyweight.
Deadlift MaxNew
Calculate your deadlift 1RM and compare to strength standards.
VO2 MaxNew
Measure aerobic fitness with Cooper or Rockport tests.
Cardio & Endurance (7)
Optimize cardio training and heart health
Heart Rate Zones
Calculate optimal heart rate zones for cardio training.
Pace Calculator
Calculate running or walking pace for training and races.
Max Heart RateNew
Calculate your maximum heart rate with multiple formulas.
Target Heart RateNew
Find your target HR for different training intensities.
Resting Heart RateNew
Assess your cardiovascular fitness with RHR classification.
Swimming PaceNew
Calculate swimming pace per 100m/100yd for training.
Cycling PowerNew
Calculate watts and FTP for cycling performance.
Ready to Start Your Fitness Journey?
Choose a calculator above to get personalized, AI-powered recommendations. All tools are completely free and require no registration.