Health Calculators
163 free calculators for fitness, nutrition, pregnancy, family health, medical reference, sleep, and wellness.
A1C to Estimated Average Glucose Calculator
Convert A1C percentage to estimated average glucose.
Added Sugar Calculator
Convert added-sugar calories and percentages into grams.
Aerobic Training Zone Calculator
Estimate an aerobic training heart-rate zone from age and resting heart rate.
Alcohol Calories From Grams Calculator
Estimate calories supplied by alcohol grams.
Alcohol Units Calculator
Estimate standard drinks from beverage volume and alcohol percentage.
Anaerobic Training Zone Calculator
Estimate a higher-intensity heart-rate zone.
Baby Feeding Interval Calculator
Estimate feeds per day from a feeding interval.
Baby Formula Can Duration Calculator
Estimate how many days a can of formula will last.
Baby Formula Daily Volume Calculator
Estimate daily formula volume from feeds and ounces per feed.
Baby Sleep Total Calculator
Calculate total daily sleep from nighttime sleep and naps.
Baby Wipes Supply Calculator
Estimate wipes needed from changes per day and wipes per change.
Basketball Calories Calculator
Estimate calories burned during basketball.
Bedtime Consistency Calculator
Calculate the range between earliest and latest bedtime.
Blood Pressure Category Calculator
Classify an adult blood pressure reading using common U.S. categories.
BMI Calculator
Calculate body mass index from height and weight.
BMR Calculator
Estimate calories your body uses at complete rest with the Mifflin–St Jeor equation.
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy circumference method.
Body Surface Area Calculator
Estimate body surface area using the Mosteller formula.
Body Weight Protein Target Calculator
Estimate daily protein from body weight and target grams per pound.
Body Weight Water Estimate Calculator
Estimate daily water intake using body weight.
Breast Milk Storage Supply Calculator
Estimate storage bags needed for a milk supply.
Cadence Speed Calculator
Estimate cycling speed from cadence, gear ratio, and wheel circumference.
Caffeine Daily Total Calculator
Add caffeine from coffee, tea and other drinks.
Caffeine Half-Life Calculator
Estimate caffeine remaining after a selected number of hours.
Calorie Deficit Calculator
Estimate a daily calorie target from maintenance calories and a planned weekly change.
Calorie Deficit Timeline Calculator
Estimate weeks to reach a weight-loss target from a daily calorie deficit.
Calories Burned Calculator
Estimate exercise calories from MET intensity, weight and duration.
Carbohydrate Calories Calculator
Convert grams of carbohydrate to calories.
Child Growth Rate Calculator
Calculate average height gained per year between two measurements.
Child Medicine Schedule Interval Calculator
Create simple clock times from a prescribed interval.
Child Screen Time Weekly Calculator
Calculate total weekly screen time.
Child Weight Change Calculator
Calculate weight change and percentage change.
Cholesterol Total to HDL Ratio Calculator
Calculate total cholesterol to HDL ratio.
Cycling Calories Calculator
Estimate calories burned while cycling from weight, duration and intensity.
Cycling Speed Calculator
Calculate cycling speed from distance and time.
Daily Added Sugar Limit Calculator
Estimate a daily added-sugar limit from calorie intake and a chosen percentage.
Daily Calorie Calculator
Estimate daily calories for maintenance, weight loss or weight gain.
Daily Carbohydrate Calculator
Estimate carbohydrate grams from daily calories and a chosen percentage.
Daily Fat Intake Calculator
Estimate daily fat grams from calories and a selected percentage.
Daily Fiber Calculator
Estimate a daily fiber target from calorie intake.
Daily Meal Calorie Split Calculator
Split daily calories across meals and snacks.
Daily Saturated Fat Limit Calculator
Estimate a saturated-fat limit from calorie intake and percentage.
Daily Sitting Time Calculator
Calculate weekly sitting time.
Daily Step Distance Calculator
Estimate walking distance from steps and stride length.
Dancing Calories Calculator
Estimate calories burned during dancing.
Diaper Supply Calculator
Estimate diapers needed for a selected number of days.
Drops Per Minute Calculator
Calculate IV drops per minute from volume, time, and drop factor.
Due Date Countdown Calculator
Count days until an estimated due date.
Electrolyte Drink Mix Calculator
Calculate powder needed for a selected drink volume.
Elliptical Calories Calculator
Estimate calories burned during elliptical.
Estimated Average Glucose to A1C Calculator
Convert estimated average glucose to an approximate A1C.
Family Age Gap Calculator
Calculate the age gap between two birth dates.
Family Bedtime Calculator
Calculate a bedtime from wake time and desired sleep duration.
Family Water Bottle Calculator
Estimate total family water bottles needed per day.
Fat Calories Calculator
Convert grams of fat to calories.
Fiber Per 1000 Calories Calculator
Calculate fiber density per 1,000 calories.
Fluid Ounce to Cup Nutrition Calculator
Convert fluid ounces to US cups.
Food Cost Per Calorie Calculator
Calculate food cost per 100 calories.
Daily Fruit and Vegetable Serving Calculator
Add daily fruit and vegetable servings.
Gardening Calories Calculator
Estimate calories burned during gardening.
Gestational Age From Due Date Calculator
Estimate gestational age from a due date.
Golf Walking Calories Calculator
Estimate calories burned during golf walking.
Habit Completion Rate Calculator
Calculate the completion rate for a habit.
Habit Streak End Date Calculator
Calculate the date a planned streak reaches its goal.
Healthy Weight Range Calculator
Estimate the BMI-based healthy weight range for an adult height.
Heart Rate Calculator
Convert a timed pulse count into beats per minute.
Heart Rate From Beats Calculator
Calculate heart rate by counting beats over a timed interval.
Heart Rate Reserve Calculator
Calculate heart rate reserve.
Heart Rate Reserve Target Calculator
Estimate target heart rate using heart rate reserve.
Heart Rate Zone Calculator
Estimate five training heart-rate zones from age and resting heart rate.
Housework Calories Calculator
Estimate calories burned during housework.
Hydration Bottle Count Calculator
Convert a daily water target into a number of bottles.
Hydration During Exercise Calculator
Estimate fluid needs during exercise.
Ideal Weight Calculator
Estimate a reference weight range from height using several common formulas.
IV Bag Duration Calculator
Calculate how long an IV bag lasts at an entered flow rate.
Jump Rope Calories Calculator
Estimate calories burned during jump rope.
Kayaking Calories Calculator
Estimate calories burned during kayaking.
Lawn Mowing Calories Calculator
Estimate calories burned during lawn mowing.
LDL Cholesterol Estimate Calculator
Estimate LDL cholesterol using total cholesterol, HDL, and triglycerides.
Lean Body Mass Calculator
Estimate lean body mass from weight and body-fat percentage.
Macro Calculator
Split a daily calorie target into protein, carbohydrate and fat grams.
Maternity Leave End Date Calculator
Calculate an estimated return date from leave start and leave length.
Maximum Heart Rate Calculator
Estimate maximum heart rate using two common age-based formulas.
Meal Carbohydrate Percentage Calculator
Calculate the percentage of meal calories supplied by carbohydrates.
Meal Fat Percentage Calculator
Calculate the percentage of meal calories supplied by fat.
Meal Portion Scaling Calculator
Scale an ingredient amount when changing recipe servings.
Meal Protein Percentage Calculator
Calculate the percentage of meal calories supplied by protein.
Meal Sodium Percentage Calculator
Calculate meal sodium as a percentage of a daily limit.
Mean Arterial Pressure Calculator
Estimate mean arterial pressure from systolic and diastolic blood pressure.
Medication Supply Days Calculator
Calculate how many days a prescribed supply will last.
MET Calories Burned Calculator
Estimate calories burned using MET value, body weight, and activity time.
MET Minutes Calculator
Calculate weekly activity volume in MET-minutes.
Mosteller Body Surface Area Calculator
Estimate body surface area using the Mosteller formula.
Net Carbohydrate Calculator
Estimate net carbohydrates from total carbohydrate, fiber, and sugar alcohols.
Non-HDL Cholesterol Calculator
Calculate non-HDL cholesterol.
Nutrition Label Serving Calculator
Scale nutrition facts to the number of servings eaten.
One Rep Max Calculator
Estimate one-repetition maximum from weight lifted and repetitions.
Outdoor Time Weekly Calculator
Calculate total weekly outdoor time.
Ovulation Calculator
Estimate ovulation and a fertile window from cycle dates.
Oxygen Tank Duration Calculator
Estimate oxygen cylinder duration from available volume and flow rate.
Pace Calculator
Calculate pace per mile and speed from distance and elapsed time.
Pilates Calories Calculator
Estimate calories burned during pilates.
Plank Progress Calculator
Project plank hold time after a weekly improvement rate.
Pregnancy Days Remaining Calculator
Estimate days remaining until 40 weeks.
Pregnancy Due Date Calculator
Estimate a pregnancy due date from the first day of the last menstrual period.
Pregnancy Trimester Calculator
Estimate pregnancy trimester from gestational weeks.
Prescription Refill Date Calculator
Estimate a refill date from supply date and days supplied.
Protein Calories Calculator
Convert grams of protein to calories.
Protein Cost Calculator
Calculate food cost per 25 grams of protein.
Protein Intake Calculator
Estimate a daily protein range from body weight and training goal.
Protein Intake Range Calculator
Estimate daily protein using a selected grams-per-pound target.
Pulse Pressure Calculator
Calculate pulse pressure from systolic and diastolic readings.
Push-Up Pace Calculator
Calculate push-ups per minute and projected repetitions.
Recipe Calories Per Serving Calculator
Calculate calories per serving for a recipe.
Recipe Protein Per Serving Calculator
Calculate protein per serving for a recipe.
Respiratory Rate From Breaths Calculator
Calculate breaths per minute from a timed count.
Resting Calorie Needs Calculator
Estimate resting calorie needs with the Mifflin-St Jeor equation.
Rowing Calories Calculator
Estimate calories burned during rowing.
Running Calorie Estimate Calculator
Estimate calories burned while running using body weight and distance.
Running Pace Calculator
Calculate minutes per mile from distance and total time.
Running Speed Calculator
Convert running pace into miles per hour and kilometers per hour.
School Age Calculator
Calculate a child’s age on a selected school start date.
Screen Break Interval Calculator
Calculate how many screen breaks fit into a work period.
Sit-Up Pace Calculator
Calculate sit-ups per minute and projected repetitions.
Skating Calories Calculator
Estimate calories burned during skating.
Skiing Calories Calculator
Estimate calories burned during skiing.
Sleep Calculator
Plan wake-up or bedtime options using 90-minute sleep cycles.
Sleep Cycle Calculator
Estimate complete 90-minute sleep cycles.
Sleep Cycle Wake Time Calculator
Estimate sleep duration from complete 90-minute cycles.
Sleep Debt Calculator
Estimate accumulated sleep shortfall over several days.
Sleep Deficit Weekly Calculator
Estimate weekly sleep deficit.
Sleep Efficiency Calculator
Calculate sleep efficiency from time asleep and time in bed.
Smoking Pack Years Calculator
Calculate smoking exposure in pack-years.
Smoking Time Saved Calculator
Estimate time saved after quitting from cigarettes avoided.
Snow Shoveling Calories Calculator
Estimate calories burned during snow shoveling.
Soccer Calories Calculator
Estimate calories burned during soccer.
Sodium Intake Calculator
Total sodium from servings and compare it with a daily limit.
Standing Desk Time Calculator
Calculate standing time from work hours and standing percentage.
Step Goal Progress Calculator
Calculate progress toward a daily step goal.
Steps to Miles Calculator
Convert steps to estimated miles using your stride length.
Stride Length Calculator
Estimate average stride length from distance and steps.
Swimming Calories Calculator
Estimate swimming calories from body weight, time and intensity.
Target Heart Rate Calculator
Estimate exercise heart-rate zones using age and resting heart rate.
TDEE Calculator
Estimate total daily energy expenditure from BMR and activity level.
Temperature Conversion Health Calculator
Convert between Fahrenheit and Celsius.
Tennis Calories Calculator
Estimate calories burned during tennis.
Training Load Calculator
Estimate session training load from duration and perceived exertion.
Training Volume Calculator
Calculate total resistance-training volume.
VO₂ Max Calculator
Estimate VO₂ max from resting and maximum heart rate.
Waist to Height Ratio Calculator
Calculate waist-to-height ratio as a general screening measure.
Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio from circumference measurements.
Walking Calories Calculator
Estimate calories burned while walking using weight, time and pace.
Walking Pace Calculator
Calculate minutes per mile from distance and elapsed time.
Walking Steps Distance Calculator
Estimate miles from step count and stride length.
Walking Time Calculator
Estimate walking time from distance and speed.
Water Bottle Count Calculator
Calculate how many bottles meet a daily water target.
Water Intake by Weight Calculator
Estimate a general daily water target from body weight.
Water Intake Calculator
Estimate a basic daily water target from body weight and activity.
Weekly Calorie Average Calculator
Calculate average daily calories from a weekly total.
Weekly Exercise Minutes Calculator
Calculate total weekly exercise minutes.
Weight Loss Calculator
Estimate time to a weight goal from a planned daily calorie deficit.
Workout Rest Time Calculator
Estimate total rest time during a strength workout.
Workout Volume Calculator
Calculate total strength-training volume.