14 free tools
Health & Fitness calculators
Body measurements, pregnancy dates, hydration and heart-rate training zones. Each tool shows the formula, worked examples and sources.
Health & FitnessBlood Pressure CalculatorCheck which category a blood pressure reading falls into, plus mean arterial pressure and pulse pressure.Health & FitnessBlood Sugar CalculatorConvert blood glucose between mg/dL and mmol/L and see where a fasting, after-glucose or random reading falls, plus HbA1c to average glucose.Health & FitnessBMI CalculatorBody mass index with WHO categories and a healthy weight range for your height.Health & FitnessBody Fat CalculatorEstimate body fat percentage from a tape measure using the U.S. Navy method, with fat mass and lean mass.Health & FitnessCalorie Calculator (TDEE)Daily calories to maintain, lose or gain weight, using the Mifflin-St Jeor equation.Health & FitnessCholesterol CalculatorUnderstand a lipid panel: LDL (Friedewald), non-HDL cholesterol, total/HDL ratio and the category of each number, in mg/dL or mmol/L.Health & FitnessHeart Rate Zone CalculatorMaximum heart rate and five training zones, with the Karvonen method if you know your resting pulse.Health & FitnessIdeal Weight CalculatorIdeal body weight by the Devine, Robinson, Miller and Hamwi formulas, plus the healthy BMI range.Health & FitnessMacro CalculatorSplit your daily calories into grams of protein, carbohydrate and fat for a balanced, high-protein, low-carb or keto plan.Health & FitnessOvulation & Fertile Window CalculatorYour likely ovulation day, fertile window and next period for the next three cycles.Health & FitnessPregnancy Due Date CalculatorEstimated due date, how many weeks pregnant you are and key milestones.Health & FitnessRunning Pace CalculatorWork out running pace per km or per mile, finish time or distance — fill in any two and leave one empty.Health & FitnessSleep CalculatorFind the best bedtime for your wake-up time, or the best time to wake up, using 90-minute sleep cycles.Health & FitnessWater Intake CalculatorHow much water to drink per day for your weight, exercise and climate.