BMI Calculator
Calculate your Body Mass Index (BMI) and determine your healthy weight range.
Complete Directory of 40 Scientific Fitness Calculators
Every health, exercise physiology, nutrition, 1RM strength, cardio, and military fitness calculator on Fitness Goal 4U is indexed below with verified scientific formulas and clinical documentation.
Body Composition & Health Calculators (10 Tools)
Calculate BMI, body fat percentage, BMR, TDEE, lean body mass, ideal weight, and metabolic baseline with validated clinical formulas.
BMI Prime Calculator
Calculate your BMI relative to the upper threshold of standard healthy weight.
BMR Calculator
Estimate your Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict formulas.
TDEE Calculator
Calculate your Total Daily Energy Expenditure and personalized calorie maintenance.
Body Fat Calculator
Estimate your body fat percentage and lean mass using the US Navy tape method.
Lean Body Mass Calculator
Calculate your lean body mass using Boer, James, and Hume clinical formulas.
FFMI Calculator
Calculate Fat-Free Mass Index and Normalized FFMI to assess muscular development.
Ideal Weight Calculator
Compare ideal healthy body weights across Devine, Robinson, Miller, and Hamwi formulas.
Waist-to-Height Ratio Calculator
Evaluate cardiometabolic risk and visceral abdominal fat using the Ashwell shape chart.
Fitness Age Calculator
Calculate your biological fitness age based on resting heart rate, exercise, and BMI.
Calories, Diet & Nutrition Calculators (8 Tools)
Estimate daily calorie requirements, target deficits and surpluses, macronutrient breakdowns, optimal protein targets, and hydration.
Calorie Calculator
Estimate your daily calorie needs for weight loss, maintenance, or muscle gain.
Calorie Deficit Calculator
Calculate safe calorie deficits (10% to 25%) and weekly projected fat loss.
Calorie Surplus Calculator
Calculate optimal lean bulking calorie surplus to maximize muscle hypertrophy.
Macro Calculator
Calculate protein, carbohydrate, and fat gram breakdowns for various diet types.
Protein Calculator
Estimate optimal daily protein intake based on training volume, muscle growth, and cutting.
Water Intake Calculator
Calculate your daily hydration requirements based on weight, exercise, and climate.
Weight Loss Calculator
Project your weight loss timeline and daily calorie requirements to reach your goal.
Weight Gain Calculator
Plan your muscle building weight gain timeline and daily calorie surplus.
Strength & Weightlifting Calculators (8 Tools)
Estimate 1-rep maximums for squat, bench, and deadlift, calculate barbell loading plates, Wendler 5/3/1 training maxes, and volume tonnage.
1RM Calculator
Estimate your 1-Repetition Maximum using Brzycki, Epley, Lander, and Lombardi formulas.
Squat 1RM Calculator
Estimate your maximum squat 1RM and evaluate your lower body strength tier.
Bench Press 1RM Calculator
Estimate your bench press 1RM and compare with strength level benchmarks.
Deadlift 1RM Calculator
Estimate your deadlift 1RM and test your posterior chain strength standards.
Plate Calculator
Calculate the exact barbell plate combination per side for any target weight.
Training Max Calculator
Calculate 80%, 85%, and 90% Training Maxes and Wendler 5/3/1 working wave sets.
Workout Volume Calculator
Calculate total workout volume tonnage, sets, reps, and average load per exercise.
Strength Level Calculator
Benchmark your strength across squat, bench, deadlift, and overhead press.
Workout & Gym Timers Calculators (2 Tools)
High-precision workout rest timers and customizable interval/HIIT/Tabata timers with auditory cues and round progress tracking.
Workout Rest Timer
Accurate gym rest interval timer with synthesized audio cues and set tracking.
Interval Timer
Customizable HIIT, Tabata, and circuit timer with prepare, work, and rest phases.
Running, Walking & Cardio Calculators (6 Tools)
Calculate running pace, splits for 5K to marathon, calories burned during running, walking, and cycling, and step conversions.
Pace Calculator
Calculate running pace, time, speed, and race split projections for 5K, 10K, half & full marathon.
Running Calorie Calculator
Estimate calories burned while running based on speed, weight, duration, and incline.
Walking Calorie Calculator
Calculate calories burned walking based on body weight, speed, grade, and duration.
Cycling Calorie Calculator
Estimate calories burned cycling based on riding speed, effort intensity, and body weight.
Steps to Calories Calculator
Convert daily step counts into calories burned, kilometers, and miles walked.
Steps to Distance Calculator
Convert step count to kilometers, miles, and meters based on height and gender stride.
Heart Rate & Cardio Fitness Calculators (3 Tools)
Determine personalized aerobic zones (Zones 1-5), Karvonen target heart rates, and estimate VO2 Max using validated field protocols.
Heart Rate Zone Calculator
Calculate your personalized 5 training heart rate zones using Tanaka and Karvonen formulas.
Target Heart Rate Calculator
Calculate target exercise heart rate for any desired workout intensity percentage.
VO2 Max Calculator
Estimate your maximal oxygen uptake using Cooper, 1.5-mile, Rockport, or resting HR tests.
Military & Fitness Tests Calculators (3 Tools)
Official US Army AR 600-9 circumference body fat calculator, APFT/ACFT scoring breakdown, and YMCA normative push-up tests.
Army Body Fat Calculator
Calculate military body fat percentage based on official US Army AR 600-9 tape test standards.
Army PFT Calculator
Calculate official Army Physical Fitness Test (APFT) scores for push-ups, sit-ups, and 2-mile run.
Push-Up Test Calculator
Assess upper body muscular endurance against YMCA and ACSM normative standards.