Health & Fitness Calculators
Free health calculators including BMI, calorie, pregnancy due date, body fat, and more.
15 calculators available
BMI Calculator
Calculate your BMI (Body Mass Index) instantly. See if you are underweight, normal weight, overweight, or obese.
Use calculator →Calorie Calculator
Calculate how many calories you need per day to maintain, lose, or gain weight. Based on age, height, weight, and activity level.
Use calculator →Pregnancy Due Date Calculator
Calculate your estimated due date based on your last menstrual period or conception date. See your pregnancy timeline week by week.
Use calculator →BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at rest. Uses Mifflin-St Jeor and Harris-Benedict equations.
Use calculator →Ideal Weight Calculator
Calculate your ideal weight based on height, age, and gender. Uses multiple formulas including Devine, Robinson, and Hamwi.
Use calculator →Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter your measurements and see where you fall on the body fat chart.
Use calculator →Macro Calculator
Calculate your daily macronutrient needs for your fitness goal. Get personalised protein, carb, and fat targets.
Use calculator →Ovulation Calculator
Calculate your most fertile days and ovulation date based on your menstrual cycle. Plan pregnancy or track your cycle.
Use calculator →Period Calculator
Predict your next period date based on your cycle length. Track your menstrual cycle and see upcoming period dates.
Use calculator →Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity level, and climate.
Use calculator →Heart Rate Zone Calculator
Calculate your target heart rate zones for exercise. Find your fat-burning, cardio, and peak zones.
Use calculator →Sleep Calculator
Calculate the best time to go to sleep or wake up based on sleep cycles. Get optimal sleep timing for better rest.
Use calculator →Blood Alcohol Calculator
Estimate your blood alcohol content (BAC) based on drinks consumed, weight, and time. Know the SA legal limit of 0.05g/100ml.
Use calculator →One Rep Max Calculator
Calculate your one-rep max (1RM) for any lift. Uses Epley, Brzycki, and other proven formulas.
Use calculator →Pace Calculator
Calculate your running pace, finish time, or distance. Plan your 5K, 10K, half marathon, or marathon pace.
Use calculator →