🇺🇸 US & 🇨🇦 Canada
Health & Fitness Calculators
Understand your body's numbers — with honest context about what each measure can and can't tell you. Metric and imperial supported throughout.
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BMI Calculator
Body Mass Index, metric or imperial, with limitations explained.
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Calorie / TDEE
Daily calorie needs for your goal — lose, maintain or gain.
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BMR Calculator
Basal metabolic rate via the Mifflin-St Jeor formula.
A note on health calculators. These tools give population-level estimates. They aren't a diagnosis and can't replace a conversation with your doctor — especially if you're pregnant, an athlete, very muscular, or managing a health condition.