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BMI Calculator
Check your body mass index, healthy weight range, and reference weight estimates from height and weight.
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TDEE & Calorie Calculator
Estimate BMR, TDEE, maintenance calories, and calorie deficit or surplus targets.
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Sleep Calculator
Calculate bedtime, wake-up time, sleep duration, age-based sleep needs, and optional sleep-cycle estimates.
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Body Fat Calculator
Estimate body fat percentage, fat mass, and lean body mass using body circumference measurements.
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BMR Calculator
Estimate calories your body uses at rest using Mifflin-St Jeor and Harris-Benedict formulas.
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Pace Calculator
Calculate running pace, finish time, race splits, and learn how pace relates to training heart-rate zones.
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Water Intake Calculator
Estimate daily water and fluid needs based on body size, activity, exercise, climate, and life stage.
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Pregnancy Calculator
Estimated due date, pregnancy week, gestational age, trimester, conception date, and IVF due date from LMP, conception, embryo transfer, ultrasound, or a known due date.
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Protein Calculator
Estimate your daily protein range and per-meal target from body weight, activity, age, and goal.
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One Rep Max Calculator
Estimate your 1RM from weight and reps, compare formulas, and see training weights for bench, squat, and deadlift.
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Heart Rate Zone Calculator
Calculate your Zone 1-5 heart rate zones, Zone 2 cardio heart rate, and max heart rate by age.
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Calories Burned Calculator
Calories burned by activity, walking/running distance, or steps, with calories per minute, hour, mile, and 1,000 steps.
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Pregnancy Weight Gain Calculator
Recommended weight gain during pregnancy by trimester.
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Ovulation & Conception Calculator
Estimate your ovulation date, fertile window, best days to conceive, and an estimated conception date from your cycle or due date.
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Fat Intake Calculator
Calculate daily fat grams from calories, compare the adult 20% to 35% fat range, and see an optional saturated-fat heart-health reference.
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Macro Calculator
Calculate daily protein, carbohydrate, and fat grams from your calorie target and macro split.
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Carbohydrate Calculator
Convert a calorie target into carb grams, find carb percentage, or get carbs remaining after protein and fat.
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Lean Body Mass Calculator
Estimate lean body mass from body-fat percentage, or compare the Boer, James, and Hume height-and-weight formulas.
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