Health & fitness calculators
BMI, calories, macros, training zones and due dates. 22 in this section.
- BMI CalculatorBody mass index from height and weight, with the standard category and a weight range for your height.
- BMR CalculatorBasal metabolic rate with the Mifflin-St Jeor equation, plus the revised Harris-Benedict estimate.
- Calorie CalculatorDaily calorie needs (TDEE) by activity level, with moderate targets to maintain, lose or gain weight.
- Body Fat CalculatorEstimate body fat percentage with the US Navy tape-measure method, plus fat and lean mass.
- Ideal Weight CalculatorIdeal body weight from height using the Devine, Robinson, Miller and Hamwi formulas, plus the BMI-based range.
- Lean Body Mass CalculatorLean body mass with the Boer formula, compared with the James and Hume equations.
- Macro CalculatorDaily protein, carbs and fat in grams based on your calorie needs and goal.
- Protein CalculatorDaily protein in grams based on body weight and activity, using g/kg guidelines.
- Water Intake CalculatorHow much water to drink a day, based on body weight, exercise and climate.
- Pace CalculatorSolve for running pace, finish time or distance, with speed and race-time projections.
- Heart Rate Zone CalculatorTraining heart rate zones and a target heart rate with the Karvonen (heart rate reserve) method.
- One Rep Max CalculatorEstimate your one-rep max from a set of reps using the Epley and Brzycki formulas, with a percentage chart.
- Calories Burned CalculatorCalories burned during exercise and everyday activities, using MET values and your body weight.
- Due Date CalculatorEstimate a pregnancy due date from the last menstrual period or conception date, adjusted for cycle length.
- Pregnancy Week CalculatorHow many weeks pregnant you are today, which trimester you are in and how many days remain.
- Ovulation CalculatorEstimate ovulation, your fertile window and next period from your last period and cycle length.
- Sleep CalculatorFind bedtimes or wake-up times that line up with 90-minute sleep cycles.
- Waist-to-Height Ratio CalculatorWaist-to-height ratio, a simple measure of where body fat is carried, with the standard reference bands.
- Steps to Miles CalculatorConvert steps to miles or kilometers using a stride length estimated from your height.
- VO2 Max CalculatorEstimate VO2 max from the distance covered in the Cooper 12-minute run test.
- Body Surface Area CalculatorBody surface area (BSA) with the Mosteller and DuBois formulas, plus Haycock and Gehan-George.
- Max Heart Rate CalculatorEstimate maximum heart rate by age with several common formulas, plus moderate and vigorous target ranges.