Health Calculators — United States
Browse live health calculators for United States.
Body Composition
Bmi Calculator
Open the Bmi Calculator and calculate instantly in your browser.
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Body Fat Calculator
Open the Body Fat Calculator and calculate instantly in your browser.
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Body Mass Index Advanced Calculator
Open the Body Mass Index Advanced Calculator and calculate instantly in your browser.
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Nutrition
Calorie Calculator
Open the Calorie Calculator and calculate instantly in your browser.
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Protein Intake Calculator
Your daily protein target in grams from bodyweight and goal, with a per-meal split and food equivalents.
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Training
Heart Rate Zone Calculator
Your max heart rate and five training zones from age — with the Karvonen resting-HR method for personal zones.
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One-Rep Max (1RM) Calculator
Estimate your one-rep max from any weight and reps — Epley, Brzycki and more — plus a %1RM training-load table.
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Pregnancy & Baby
Pregnancy Due Date Calculator
Estimate your due date from your last period, conception date or IVF transfer — with gestational age and trimester.
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Ovulation Calculator
Your fertile window and ovulation date from your last period and cycle length — with the best days to conceive.
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Environment
Carbon Footprint Calculator
Open the Carbon Footprint Calculator and calculate instantly in your browser.
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Lifestyle Impact
Cost of Smoking Calculator
Estimate the annual, decade-long, and lifetime cost of smoking, including opportunity cost.
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About these calculators
Health calculator outputs are estimates only and are not medical advice.