Health Calculators

Track your body metrics — BMI, calories, ideal weight, heart rate zones and pregnancy milestones. 13 tools.

All Health calculators

Estimate your blood alcohol concentration with the Widmark formula based on drinks, weight, sex and time elapsed.

Calculate your Body Mass Index instantly and see which weight category you fall into, for metric or imperial units.

Calculate your basal metabolic rate with the Mifflin-St Jeor equation and see your calorie needs at every activity level.

Estimate your body fat percentage with the US Navy method using waist, neck and hip measurements, in metric or imperial units.

Estimate your daily calorie needs with the Mifflin-St Jeor formula and get targets for maintaining, losing or gaining weight.

Estimate your baby's due date from your last period or conception date, adjusted for your typical cycle length.

Find your maximum and target heart rates for exercise, with Karvonen training zones based on your age and resting heart rate.

Estimate your ideal body weight with the Devine formula and see your healthy BMI weight range, adjusted for frame size.

Split your daily calories into protein, carbs and fat and get exact gram targets for maintaining, losing or gaining weight.

Find your estimated ovulation day and fertile window from your last period and typical cycle length.

Estimate your due date from your last menstrual period and see your current week of pregnancy, trimester and days along.

Calculate your total daily energy expenditure and see your BMR, activity burn and calories for cutting, maintaining or bulking.

Estimate how much water you should drink daily based on your weight and exercise, in milliliters, liters and cups.

BMI Calculator · Body Fat Calculator · Calorie Calculator . Each tool includes a formula, worked example, step-by-step calculation and FAQ.

Search all Calcona calculators — or browse another category.