Health & Fitness Calculators
BMI, calorie, BMR, TDEE, body fat, macro, pregnancy and fitness calculators in metric and imperial units.
BMI CalculatorBody mass index with WHO category and healthy weight range.Calorie CalculatorDaily calories to maintain, lose or gain weight.BMR CalculatorBasal metabolic rate with Mifflin–St Jeor, Harris–Benedict or Katch–McArdle.TDEE CalculatorTotal daily energy expenditure: your maintenance calories.Body Fat CalculatorBody fat % with the US Navy tape-measure method.Ideal Weight CalculatorIdeal body weight by Robinson, Miller, Devine and Hamwi.Macro CalculatorDaily grams of protein, carbs and fat for your calories.Protein CalculatorHow much protein you need per day.Pregnancy CalculatorHow many weeks pregnant you are and your trimester.Pregnancy Due Date CalculatorDue date from last period, conception or IVF transfer.Ovulation CalculatorOvulation date and fertile window for the next 6 cycles.Heart Rate CalculatorMax heart rate and training zones (Karvonen).One Rep Max CalculatorEstimate your 1RM and training weights by reps.Pace CalculatorRunning pace, time or distance, and race predictions.Calories Burned CalculatorCalories burned by activity using MET values.Body Surface Area CalculatorBSA by Mosteller, Du Bois, Haycock and more.
About Health & Fitness Calculators
Health and fitness calculators turn widely used, peer-reviewed formulas, such as Mifflin-St Jeor for metabolic rate and the US Navy method for body fat, into quick estimates. They support metric and imperial units. These are screening and planning tools, not medical diagnoses; talk to a qualified professional about your health.