Health & Fitness

BMI, calories, macros, pregnancy tools and more — evidence-based calculators for everyday health decisions.

19 tools · Private · Browser-only

Body composition

BMI Calculator

Body Mass Index from height and weight.

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Body Fat Calculator

Estimate body fat with the U.S. Navy method.

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Lean Body Mass Calculator

Fat-free mass from height and weight.

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FFMI Calculator

Fat-free mass index for athletes.

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Ideal Weight Calculator

Reference weight ranges by height.

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Waist-to-Hip Ratio

Body-shape health indicator.

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Calories & nutrition

BMR Calculator

Basal metabolic rate at rest.

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TDEE Calculator

Total daily energy expenditure.

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Calorie Calculator

Daily calorie needs by activity level.

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Calorie Deficit Calculator

Targets for gradual weight change.

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Protein Intake Calculator

Daily protein target in grams.

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Macronutrient Calculator

Protein, carbs and fat targets.

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Water Intake Calculator

Daily hydration target.

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Cardio

Pace Calculator

Pace, distance and finish time.

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Heart Rate Zone Calculator

Five training zones from max HR.

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Pregnancy

Pregnancy Calculator

Weeks pregnant and trimester.

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Due Date Calculator

Estimated due date from LMP.

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Pregnancy Conception Calculator

Estimated conception date.

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Ovulation Calculator

Estimated fertile window.

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