Health & Fitness Calculators

Track your well-being, optimize your diet, and hit your fitness goals with our comprehensive suite of free health calculators.

BMI Calculator

Calculate your Body Mass Index and see where you fall on the height-to-weight chart.

Determine how many calories you should eat a day to maintain, lose, or gain weight.

Calculate your Total Daily Energy Expenditure (TDEE) based on your activity level.

Find your optimal macronutrient ratio (protein, carbs, fat) for your fitness goals.

Discover your ideal body weight based on your height, age, and gender.

Estimate your body fat percentage using standard tape measurements.

Find the best times to sleep and wake up based on natural sleep cycles.

Calculate how much water you should drink daily based on weight and activity.

Determine your target heart rate zones for different types of cardiovascular training.

Calculate your estimated due date, current trimester, and major pregnancy milestones.

Calculate your fertility window and estimated ovulation dates.

Determine possible blood types for a child based on parents' blood types.