37 calculators in this category
Convert A1C percentage to estimated average glucose — for general education, not diagnosis.
HealthBlood Alcohol Content EstimatorRough BAC estimate using the Widmark formula — for education only, not for determining fitness to drive.
HealthBlood Pressure Category CheckerCheck which general category a blood pressure reading falls into — not a diagnosis.
HealthBMI CalculatorCalculate your Body Mass Index, see your category, and find the healthy weight range for your exact height.
HealthBMR CalculatorEstimate Basal Metabolic Rate using the Mifflin-St Jeor equation.
HealthBody Fat Percentage Calculator (Navy Method)Estimate body fat percentage for men using waist and neck measurements.
HealthBody Frame Size CalculatorEstimate skeletal frame size from height and wrist circumference.
HealthBody Surface Area CalculatorEstimate body surface area using the Mosteller formula.
HealthBody Type (Somatotype) EstimatorRough body-type classification from frame size — informal, not a clinical measure.
HealthCalorie CalculatorEstimate daily calorie target for a weight goal.
HealthCalories Burned CalculatorEstimate calories burned from activity using a MET value.
HealthCarbohydrate Intake CalculatorEstimate daily carbohydrate target from a calorie goal.
HealthChild Growth Percentile Estimator (Simplified)Very rough percentile placement — always use official CDC/WHO growth charts for real tracking.
HealthConception Date CalculatorEstimate the likely conception date from the first day of your last period.
HealthFat Intake CalculatorEstimate daily fat target from a calorie goal.
HealthFertility Window CalculatorEstimate the fertile window length before ovulation.
HealthGFR (Kidney Function) EstimatorEstimate glomerular filtration rate — for general education, not diagnosis.
HealthHeart Rate Zone CalculatorFind your cardio training heart rate zone.
HealthIdeal Weight Calculator (Devine Formula)Estimate ideal body weight from height using the Devine formula.
HealthLean Body Mass CalculatorCalculate lean body mass from weight and body fat percentage.
HealthLife Expectancy Estimator (Actuarial Average)Very rough population-average estimate — not a personal prediction.
HealthMacro CalculatorSplit a calorie target into protein, carb, and fat grams.
HealthMax Heart Rate CalculatorEstimate maximum heart rate from age.
HealthOne Rep Max Calculator (Epley)Estimate your one-rep max from a higher-rep set.
HealthOvulation CalculatorEstimate ovulation day from cycle length.
HealthRunning Pace CalculatorCalculate pace in minutes per mile.
HealthPeriod CalculatorPredict your next period start date from your last period and average cycle length.
HealthPregnancy Due Date CalculatorEstimate a due date from the first day of your last menstrual period.
HealthPregnancy Weight Gain CalculatorEstimate recommended weight gain range based on pre-pregnancy BMI category.
HealthProtein Intake CalculatorEstimate daily protein target for active individuals.
HealthSleep Cycle CalculatorFind a wake time that aligns with 90-minute sleep cycles.
HealthSteps to Miles CalculatorConvert step count to approximate distance.
HealthSwim Pace CalculatorCalculate swim pace per 100 meters.
HealthTDEE CalculatorEstimate Total Daily Energy Expenditure from BMR and activity level.
HealthVO2 Max Estimator (Rockport-style)Rough VO2 max estimate from a walking test.
HealthWaist-to-Hip Ratio CalculatorCalculate waist-to-hip ratio, a marker of fat distribution.
HealthWater Intake CalculatorEstimate daily water intake from body weight.