Instant health and fitness calculators — BMI, calories, macros, body fat, sleep, hydration, pregnancy dates and more. No signup required.
Use a calculator, read the short guide, then compare related tools to build a clearer picture. Healthzio is educational and does not replace medical advice.
Learn how calorie deficits work before using the calculator, including a practical pace for steady progress.
GuideUnderstand protein, carbs and fats, then turn your calorie target into a simple daily plan.
NutritionCompare common sleep recommendations and use the sleep calculator to plan wake-up-friendly cycles.
HealthCalculate your Body Mass Index and see exactly what category you fall into.
HealthFind your ideal weight range based on height, age and body frame using 4 medical formulas.
HealthEstimate your body fat percentage using the US Navy method. Track your progress over time.
HealthHow many calories do you need per day? Calculate your TDEE based on your activity level.
NutritionGet your exact protein, carbs and fat targets for your goal — lose weight, build muscle, or maintain.
NutritionHow much water should you drink per day? Get your personalised daily hydration target.
NutritionCalculate your pace, finish time or distance for any run. Perfect for 5K, 10K and marathon training.
FitnessEstimate your 1RM for bench press, squat, deadlift and more from your working sets.
FitnessCalculate your pregnancy due date and week-by-week milestones from your last period or conception date.
FitnessFind the best bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed every time.
FitnessHow many calories do you burn running, cycling, swimming or at the gym? 40+ exercises covered.
FitnessPredict your next 6 periods, fertile window and ovulation date from your last period date.
Women's HealthFind your ovulation date, fertile window and best days to conceive. Includes cycle calendar.
Women's HealthTimer, age calculator, unit converter, password generator, QR codes and more everyday tools.
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