Health & Fitness Calculators
The Health & Fitness Calculators collection on morrisfreetools provides free, privacy-first browser utilities and calculators built by Anthony Morris. All calculations, format conversions, and data processing execute locally in your web browser memory using JavaScript and WebAssembly, guaranteeing zero server uploads and complete privacy.
⚡ Which Health & Fitness Calculators tools are available for instant use?
TDEE Calculator (Total Daily Energy Expenditure & Calorie Burn)
Calculate your Total Daily Energy Expenditure (TDEE), basal metabolic rate, and daily calorie deficit or surplus for weight loss or muscle gain.
BMR Calculator (Mifflin-St Jeor & Harris-Benedict Formulas)
Calculate your Basal Metabolic Rate (calories burned at rest) using scientifically validated Mifflin-St Jeor and Katch-McArdle formulas.
Body Fat Percentage Calculator (US Navy & YMCA Method)
Estimate body fat percentage, lean body mass, fat mass, and fitness category using waist, neck, hip, and height tape measurements.
Ideal Body Weight Calculator (Devine, Robinson, Miller, Hamwi & BMI)
Free ideal body weight calculator comparing top clinical formulas (Devine, Robinson, Miller, Hamwi) and healthy BMI weight ranges for men and women.
Calorie Deficit & Weight Loss Timeline Calculator
Calculate daily maintenance calories, safe deficit target (300-500 kcal), and project your exact target weight milestone dates.
Macro Calculator (Protein, Carbs & Fats Breakdown)
Calculate personalized daily grams of protein, carbohydrates, and healthy fats tailored for cutting, maintenance, or clean bulking goals.
Daily Water Intake & Hydration Calculator
Calculate recommended daily water intake in liters and cups based on body weight, daily workout intensity, and hot weather conditions.
Pregnancy Due Date & Trimester Timeline Calculator (Naegele Rule)
Calculate estimated baby due date from last menstrual period (LMP) or conception date, current gestational age, and trimester milestones.
Ovulation & Fertile Window Calendar Calculator
Track menstrual cycle length to pinpoint estimated ovulation day, peak fertility window, next period dates, and potential implantation dates.
Target Heart Rate & Cardio Training Zone Calculator (Karvonen)
Calculate maximum heart rate (MHR) and 5 training zones (Fat Burn, Aerobic, Anaerobic, VO2 Max) using Tanaka and Karvonen formulas.
One-Rep Max (1RM) Calculator (Brzycki, Epley, Lombardi)
Estimate your 1-rep max bench press, squat, or deadlift from submaximal lifts, with working weight percentage tables (50%-95%).
Waist-to-Hip Ratio (WHR) & Body Shape Health Risk Calculator
Calculate your Waist-to-Hip Ratio (WHR) and Waist-to-Height Ratio (WHtR) to evaluate visceral fat distribution, apple vs. pear body shape, and cardiovascular health risk according to WHO standards.
Running Pace, Speed & Split Time Calculator (5K, 10K, Marathon)
Calculate running pace (min/km and min/mile), speed (km/h and mph), and race finish times for 5K, 10K, Half Marathon, Full Marathon, or custom distances.
Sleep Cycle & Bedtime Wake-Up Calculator (90-min REM Cycles)
Calculate optimal bedtimes and wake-up alarms based on 90-minute natural sleep cycles to wake up feeling refreshed and energetic.
Child & Teen BMI Percentile Calculator (CDC / WHO Ages 2-19)
Calculate Body Mass Index (BMI) and exact growth percentile for boys and girls ages 2 to 19 based on CDC and World Health Organization growth chart standards.
Steps to Distance, Miles, Kilometers & Calories Converter
Convert daily step counts (e.g. 10,000 steps) to precise kilometers, miles, walking duration, and burned active calories using your stride length.
Blood Pressure Category Checker & Mean Arterial Pressure (MAP) Calculator
Check your blood pressure reading (systolic & diastolic mmHg) against AHA/ACC guidelines: Normal, Elevated, Stage 1, Stage 2 Hypertension, or Crisis, plus Mean Arterial Pressure (MAP) and Pulse Pressure.
Blood Alcohol Content (BAC) & Sober-Up Time Calculator (Widmark)
Estimate blood alcohol concentration percentage, impairment levels, and hours until sober based on drinks consumed, gender, and body weight.
Caffeine Half-Life & Sleep Cutoff Time Calculator
Track caffeine decay curves over 24 hours: see how much active caffeine remains in your bloodstream at bedtime to prevent insomnia.
Daily Protein Intake Calculator (Hypertrophy & Fat Loss)
Calculate recommended grams of protein per day (g/kg and g/lb) based on resistance training frequency, body weight, and fitness goals.
Intermittent Fasting Timer & Fasting Window Tracker (16:8, 18:6, OMAD)
Track your fast in real time: monitor metabolic stages (Blood Sugar Drop, Ketosis, Autophagy, Peak Fat Burning) with 16:8, 18:6, 20:4, and OMAD schedules.
Frequently asked questions about Health & Fitness Calculators
Q. What tools are in the Health & Fitness Calculators category? ▼
The Health & Fitness Calculators collection on morrisfreetools includes 21 browser-native utility tools for instant calculation and processing.
Q. Are all Health & Fitness Calculators tools private and client-side? ▼
Yes, every tool in Health & Fitness Calculators runs 100% locally in your browser with zero data sent to external servers.
Q. Who developed these Health & Fitness Calculators tools? ▼
All utilities were built and maintained by Anthony Morris.
Q. Is there any cost or subscription to use Health & Fitness Calculators tools? ▼
No, all Health & Fitness Calculators tools are 100% free with unlimited usage.
Who built these Health & Fitness Calculators and how is client-side privacy guaranteed?
Authored by Anthony Morris • Creator & Project Lead • Published: August 25, 2026 • Updated: August 27, 2026
Anthony Morris founded and created morrisfreetools to provide fast, 100% client-side online calculators and utilities. Every single tool runs locally in your device's browser memory via WebAssembly and JavaScript, guaranteeing that no personal data, health metrics, text, or files are ever stored, uploaded, or tracked.