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Health & Fitness10

BMI, calories, body fat and more — free health & fitness calculators, no sign-up.

Find the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake up between cycles feeling rested instead of groggy.

Find your max heart rate and five training zones from your age, with an optional resting heart rate for more personal Karvonen zones.

Estimate your baby's due date from the first day of your last period or your conception date — plus how far along you are and your trimester.

Turn your calorie needs into daily protein, carb, and fat targets in grams — pick a goal and a diet style like balanced, high protein, or keto.

Enter distance and time to get your running pace (per km or mile) and speed — perfect for race planning.

Calculate your ideal body weight from height and sex using the Devine formula, in kg and lb.

Find out how much water you should drink per day based on your weight and activity level.

Estimate your body fat percentage from height, weight, age and sex — with a healthy-range guide.

Estimate your daily calorie needs from age, height, weight, and activity level — with maintenance, weight-loss, and weight-gain targets.

Calculate your Body Mass Index from height and weight (metric or imperial) and see your healthy weight category.