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BMI Calculator
Calculate adult body mass index and a height-based reference weight range.
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Understand everyday health measurements and wellness indicators.
Educational health estimates
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Body and Metabolism
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BMR Calculator
Estimate adult basal metabolic rate using the Mifflin–St Jeor equation.
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Calorie Calculator
Estimate adult daily maintenance calories from BMR and activity level.
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Body Fat Calculator
Estimate body-fat percentage with the US Navy circumference method.
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Healthy Weight Reference Calculator
Compare four legacy weight-reference formulas and a BMI-based range.
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Water Intake Calculator
Estimate a transparent daily fluid range with activity and climate adjustments.
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Heart Rate Zone Calculator
Estimate moderate and vigorous exercise heart-rate ranges.
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Running Pace Calculator
Calculate running pace, time, distance, speed, and cumulative splits.
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Pregnancy Due Date Calculator
Estimate a pregnancy due date, gestational week, and trimester milestones.
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Ovulation Calculator
Estimate ovulation, fertile-window, and future cycle dates.
Open calculatorAbout health calculators
These calculators provide educational estimates, not diagnoses or medical advice. Individual needs and clinical circumstances can differ.