Free Health & Fitness Calculators
Nutrition, fitness and wellbeing calculators and timers. They give estimates for information only and are not medical advice.
BMI CalculatorBody mass index in metric or US units, with healthy rangeColor Blind TestIshihara-style dot plates to screen your color visionAstigmatism TestClock-dial screening test for astigmatism, one eye at a timeOnline Eye Chart (Snellen Test)Calibrated Snellen eye chart: test each eye at homeOvulation CalculatorFertile window, ovulation day and next period, with a calendarCalorie CalculatorDaily calories to maintain, lose or gain weight (BMR & TDEE)Macro CalculatorSplit your calories into grams of protein, carbs and fatBody Fat CalculatorUS Navy tape-measure body fat percentageIdeal Weight CalculatorHealthy weight range for your height, four formulasWater Intake CalculatorHow much water to drink a day for your weight and activityHeart Rate Zone CalculatorFive training zones with the Karvonen formulaRunning Pace CalculatorPace, finish time, distance, splits and race predictionsOne Rep Max CalculatorEstimate your 1RM and training weightsSleep CalculatorBest times to go to bed or wake up, by sleep cyclesProtein CalculatorDaily protein in grams for your weight and goalSteps to Km CalculatorConvert steps to kilometres and miles from your heightCaffeine CalculatorHow much caffeine is left at bedtime (half-life chart)BAC CalculatorEstimate blood alcohol with the Widmark formula (education only)Due Date CalculatorPregnancy due date, weeks pregnant and milestonesHIIT Interval TimerWork/rest interval timer with rounds, sets and beepsBreathing ExerciseGuided box, 4-7-8 and coherent breathing with an animated circleCalories Burned CalculatorCalories burned by 30+ activities, by weight and timeWeight Loss CalculatorDaily calories and goal date to reach your target weightMeditation TimerTimer with singing-bowl bells, intervals and streaksTDEE CalculatorTotal daily energy expenditure from your BMR and activityBMR CalculatorBasal metabolic rate with Mifflin-St Jeor or Katch-McArdleKeto Macro CalculatorKeto macros: fat, protein and net carbs in gramsRace Time PredictorPredict 5K, 10K, half and marathon times from a recent raceMarathon Pace CalculatorPace and splits for your marathon goal timeWake Up Time CalculatorWhen to set your alarm if you go to bed at a given timeSteps to Miles ConverterHow many miles are your steps? Based on height or stridePregnancy Week CalculatorHow many weeks pregnant am I? Weeks, days and trimesterTabata Timer20 seconds work, 10 seconds rest, 8 roundsEMOM TimerEvery minute on the minute interval timerBox BreathingGuided 4-4-4-4 box breathing with an animated circle4-7-8 BreathingGuided 4-7-8 relaxing breath for sleep and calm