⚖️ Fitness Calculators
Health and fitness tools — body mass index calculator, weight and height converters, and related tools. All calculators are free and run entirely in your browser.
These tools are for general educational purposes only. Consult a qualified healthcare professional for medical advice or a personalized health assessment.
Calculators
BMI Calculator
Calculate your Body Mass Index in metric or imperial units. Includes BMI category reference.
🍎Calorie Calculator
Estimate daily calorie needs using the Mifflin-St Jeor equation. Get BMR, TDEE, and weight loss targets.
🔥BMR Calculator
Basal metabolic rate from three standard equations, plus daily burn at every activity level.
🏃Running Pace Calculator
Pace per mile and per km from any race distance and finish time, 5K to marathon.
📏Body Fat Calculator
Body fat percentage from tape measurements with the US Navy method and ACE categories.
🎯Ideal Weight Calculator
Four standard ideal-weight formulas compared, plus the healthy BMI range for your height.
🥗Macro Calculator
Daily protein, carbs, and fat in grams from your TDEE, goal, and preferred split.
😴Sleep Calculator
Find the best wake-up time or bedtime based on 90-minute sleep cycles to feel more alert.
🏋️One Rep Max Calculator
Estimate your 1RM from any heavy set with four formulas, plus training percentages.
❤️Heart Rate Zone Calculator
Five training zones from your age — with the Karvonen method when you know resting HR.
🎂Age Calculator
Calculate your exact age in years, months, and days. Useful for health records and forms.