Health & Fitness Calculators: Free Tools (Instant)

General Health

BMI, body fat, ideal weight, and other general health metrics

BMI Calculator

Calculate your body mass index instantly

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Body Fat Percentage Calculator

Calculate your body fat percentage instantly

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Ideal Body Weight Calculator

Calculate your ideal body weight instantly

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Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio instantly

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Biological Age Calculator

Calculate your biological age instantly

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Lean Body Mass Calculator

Calculate your lean body mass instantly

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Daily Water Intake Calculator

Calculate your daily water intake instantly

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Sleep Cycle Calculator

Calculate your sleep instantly

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Weight Loss Percentage Calculator

Calculate your weight loss percentage instantly

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FFMI Calculator

Calculate your fat-free mass index (ffmi) instantly

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Waist-to-Height Ratio Calculator

Calculate your waist-to-height ratio instantly

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Body Frame Size Calculator

Calculate your body frame size instantly

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Blood Alcohol Content (BAC) Calculator

Calculate your blood alcohol content (bac) instantly

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Body Surface Area (BSA) Calculator

Calculate your body surface area (bsa) instantly

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Body Water Percentage Calculator

Calculate your body water percentage instantly

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BMI Prime Calculator

Calculate your bmi prime instantly

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Adjusted Body Weight Calculator

Calculate your adjusted body weight instantly

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Daily Fiber Calculator

Calculate your daily fiber instantly

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Caffeine Calculator

Calculate your caffeine instantly

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Sleep Debt Calculator

Calculate your sleep debt instantly

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Smoking Recovery Timeline Calculator

Calculate your smoking recovery timeline instantly

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Heart Health

Heart rate zones, blood pressure, and cardiovascular health

Target Heart Rate Zone Calculator

Calculate your target heart rate instantly

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Maximum Heart Rate Calculator

Calculate your maximum heart rate instantly

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Blood Pressure Category Calculator

Calculate your blood pressure category instantly

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Heart Rate Recovery Calculator

Calculate your heart rate recovery instantly

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Heart Rate Training Zones Calculator

Calculate your heart rate training zones instantly

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Metabolism & Nutrition

BMR, TDEE, calorie, and macronutrient calculators

Basal Metabolic Rate (BMR) Calculator

Calculate your basal metabolic rate instantly

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TDEE Calculator

Calculate your total daily energy expenditure instantly

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Daily Calorie Calculator

Calculate your calorie instantly

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Macronutrient Calculator

Calculate your macronutrient instantly

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Calorie Deficit Calculator

Calculate your calorie deficit instantly

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Daily Protein Calculator

Calculate your protein instantly

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Keto Macro Calculator

Calculate your keto instantly

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Maintenance Calorie Calculator

Calculate your maintenance calorie instantly

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Intermittent Fasting Window Calculator

Calculate your intermittent fasting window instantly

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Net Carbs Calculator

Calculate your net carbs instantly

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Daily Fat Intake Calculator

Calculate your daily fat intake instantly

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IIFYM (If It Fits Your Macros) Calculator

Calculate your iifym (if it fits your macros) instantly

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Weight Gain Calculator

Calculate your weight gain instantly

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Fitness & Training

Strength training, running pace, and athletic performance

One Rep Max (1RM) Calculator

Calculate your one rep max instantly

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Wilks Score Calculator

Calculate your wilks score instantly

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Running Pace Calculator

Calculate your running pace instantly

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VO2 Max Calculator

Calculate your vo2 max instantly

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Race Time Predictor Calculator

Calculate your race time predictor instantly

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Exercise Hydration Calculator

Calculate your exercise hydration instantly

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Calories Burned Calculator

Calculate your calories burned instantly

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Marathon Pace Calculator

Calculate your marathon pace instantly

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Training Pace Calculator

Calculate your training pace instantly

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Running Calories Burned Calculator

Calculate your running calories burned instantly

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Stride Length Calculator

Calculate your stride length instantly

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Walking Calories Burned Calculator

Calculate your walking calories burned instantly

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Swimming Calories Burned Calculator

Calculate your swimming calories burned instantly

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Steps to Calories Calculator

Calculate your steps to calories instantly

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Cycling Calories Burned Calculator

Calculate your cycling calories burned instantly

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Hiking Calories Burned Calculator

Calculate your hiking calories burned instantly

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Jump Rope Calories Burned Calculator

Calculate your jump rope calories burned instantly

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Elliptical Calories Burned Calculator

Calculate your elliptical calories burned instantly

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Bench Press Max (1RM) Calculator

Calculate your bench press max (1rm) instantly

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Race Time Improvement Calculator

Calculate your race time improvement instantly

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Running Split Calculator

Calculate your running split instantly

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Metabolic Health

Blood sugar, diabetes risk, and metabolic health calculators

HbA1c to Average Blood Sugar Converter

Calculate your hba1c to average blood sugar converter instantly

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Blood Sugar Unit Converter

Calculate your blood sugar unit converter instantly

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Diabetes Risk Score Calculator

Calculate your diabetes risk score (findrisc) instantly

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Glycemic Load Calculator

Calculate your glycemic load instantly

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Cholesterol Ratio Calculator

Calculate your cholesterol ratio instantly

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HOMA-IR Calculator

Calculate your homa-ir instantly

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Women's Health

Pregnancy, ovulation, and women's health calculators

Pregnancy Due Date Calculator

Calculate your pregnancy due date instantly

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Pregnancy Weight Gain Calculator

Calculate your pregnancy weight gain instantly

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Ovulation Calculator

Calculate your ovulation instantly

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Period Calculator

Calculate your period instantly

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Breastfeeding Calorie Calculator

Calculate your breastfeeding calorie instantly

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Conception Date Calculator

Calculate your conception date instantly

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Fertility by Age Calculator

Calculate your fertility by age instantly

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Implantation Calculator

Calculate your implantation instantly

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Pregnancy Test Timing Calculator

Calculate your pregnancy test timing instantly

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