💪 Health & Fitness Calculators

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BMI Calculator

Calculate Body Mass Index (BMI) with WHO classification. Includes healthy weight range, BMI Prime, and Ponderal Index.

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Body Fat Calculator

Calculate body fat percentage using Navy Method or BMI Method. Includes fat mass, lean mass, category classification, and ideal ranges.

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Lean Body Mass Calculator

Calculate lean body mass (muscle mass) from weight and body fat percentage. Useful for healthy body composition goals (2025)

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Ideal Weight Calculator

Calculate ideal weight using Robinson, Miller, Devine, and Hamwi formulas. Compare 4 scientific formulas with BMI healthy range.

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FFMI Calculator

Calculate Fat-Free Mass Index to assess muscle mass level. Useful for determining natural muscle growth limits (2025)

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BSA Calculator

Calculate Body Surface Area using 5 formulas (DuBois, Mosteller, etc.). Essential for drug dosage calculation (2025)

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Height Percentile Calculator

Calculate what percentile your height is in. Based on Korean average height data (2025)

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Child Height Predictor

Predict adult height based on parents' height or current child height. Includes growth curve percentile analysis (2025)

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Pants Size Calculator

Convert waist, hip, and inseam measurements to Korean, US, European, and Japanese sizes. Gender-specific size recommendations (2025)

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Shoe Size Calculator

Convert foot length to Korean, US, European, Japanese, and Chinese shoe sizes. Men's and women's sizing supported (2025)

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BMR & Calorie Calculator

Calculate basal metabolic rate (BMR) and required calories. Supports Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.

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Calorie Calculator

Calculate goal-based calories, zigzag calorie cycling, and macronutrient distribution. Plan meals for weight loss or gain goals.

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Daily Protein Calculator

Calculate recommended daily protein intake based on weight, activity level, and goals. Helps with meal planning (2025)

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TDEE Calculator

Calculate Total Daily Energy Expenditure, goal-based calories, and macronutrient recommendations (2025)

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Daily Water Intake Calculator

Calculate recommended daily water intake based on weight, activity level, and climate. Shows in cups, glasses, and liters (2025)

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Daily Vitamin Calculator

Calculate recommended daily allowance (RDA) for 11 vitamins based on age, gender, and lifestyle (2025)

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Daily Caffeine Calculator

Calculate total caffeine intake from beverages and check safety limits. Includes coffee, tea, energy drinks (2025)

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Heart Rate Calculator

Calculate recommended heart rate based on age and exercise goals.

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Exercise Calorie Calculator

Calculate calories burned by exercise type, duration, and weight. Accurate calculation based on MET index (2025)

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1RM Calculator

Calculate one-rep max from reps and weight. For bench press, squat, deadlift, etc. (2025)

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Running Pace Calculator

Auto-calculate pace per km and average speed from target distance and time (2025)

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Interval Timer

Exercise/rest repeat timer. Perfect for HIIT, Tabata, stretching. Sound alerts supported (2025)

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Food vs Exercise Comparator

How long to run after eating a whole chicken? Calculate exercise time needed to burn food calories (2025)

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Steps Calorie Calculator

Calculate calories burned and distance traveled from steps, weight, and stride. Track 10,000-step goal (2025)

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Sleep Cycle Calculator

Calculate optimal bedtime/wake time considering 90-minute sleep cycles. Recommends 4-6 cycles (2025)

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Biorhythm Calculator

Calculate physical, emotional, and intellectual biorhythms. 23, 28, 33-day cycle analysis (2025)

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Heat Index Calculator

Calculate feels-like temperature considering temperature, humidity, and wind speed. Includes heat index and wind chill (2025)

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Expiry Date Calculator

Calculate expiration date and remaining days from manufacture date and shelf life. Shows freshness status and storage tips (2025)

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Batting Average Calculator

Calculate batting average, OBP, slugging, and OPS from at-bats, hits, walks, etc. Includes performance analysis and improvement tips (2025)