Fitness & health calculators
32 free tools. BMI, calories, body fat, heart rate, pregnancy and wellness tools.
Body composition
Army Body Fat CalculatorCalculate body fat percentage using the US Army tape test method with neck, waist, and hip measurements.BMI CalculatorCalculate your Body Mass Index and determine your healthy weight range.BMR CalculatorCalculate your Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict equations.Body Age CalculatorCalculate your biological age based on health metrics and lifestyle factors.Body Fat CalculatorCalculate your body fat percentage using Navy Method or BMI Method.Body Surface Area CalculatorCalculate BSA using Du Bois, Mosteller, Haycock, and Gehan-George formulas.Body Type CalculatorDetermine your body type (ectomorph, mesomorph, or endomorph) and get personalized fitness recommendations.Ideal Weight CalculatorCalculate your ideal body weight using multiple scientific formulas including Robinson, Miller, Devine, and Hamwi methods.Lean Body Mass CalculatorCalculate your lean body mass and body composition using multiple formulas.Pregnancy Weight Gain CalculatorCalculate recommended weight gain during pregnancy based on pre-pregnancy BMI.
Nutrition & energy
Blood Alcohol CalculatorCalculate your BAC (Blood Alcohol Content) using the Widmark formula.Caffeine CalculatorCalculate daily caffeine intake and safe consumption limits.Calorie CalculatorCalculate daily calorie needs for weight loss, maintenance, or gain.Macro CalculatorCalculate your macronutrient distribution (protein, carbs, fats) for your fitness goals.Protein CalculatorCalculate your daily protein requirements based on weight, activity level, and fitness goals.TDEE CalculatorCalculate Total Daily Energy Expenditure based on BMR and activity level for weight loss, maintenance, or muscle gain.Water Intake CalculatorCalculate your daily water intake needs based on weight, activity level, and climate.
Fitness & training
Heart Rate CalculatorCalculate your maximum heart rate and target heart rate zones for different exercise intensities.One Rep Max CalculatorCalculate your maximum weight for one repetition using multiple formulas.Pace CalculatorCalculate running pace, speed, and finish time for races.Vo2 Max CalculatorCalculate your maximum oxygen uptake for cardio fitness assessment using multiple methods.
Pregnancy & life
Conception CalculatorEstimate conception date based on due date or pregnancy status.Due Date CalculatorCalculate your pregnancy due date based on last menstrual period or conception date.Fertility CalculatorCalculate most fertile days and pregnancy probability based on menstrual cycle.Ovulation CalculatorCalculate your ovulation date and fertile window based on your menstrual cycle.Pregnancy CalculatorCalculate pregnancy week, trimester, due date, and important pregnancy milestones.
Health markers
Blood Pressure CalculatorInterpret blood pressure readings and assess cardiovascular health risk.Blood Sugar CalculatorConvert blood glucose units between mg/dL and mmol/L and track diabetes metrics.Cholesterol CalculatorCalculate cholesterol ratio and assess heart disease risk.Medication Dosage CalculatorCalculate appropriate medication dosages based on weight and prescription.Sleep CalculatorCalculate optimal sleep and wake times based on 90-minute sleep cycles.Smoking Cost CalculatorCalculate money spent on smoking and potential savings from quitting.