Health

Reference calculators for everyday health numbers: BMI, body fat, sleep cycles, hydration, pregnancy dates. These are estimates for information only, never medical advice.

108 free tools in this category. See every tool on Lelifi.

• 10-Year ASCVD CalculatorCalculate your 10-year ASCVD risk using the ACC/AHA pooled cohort equations. See
• 10-Year ASCVD Risk CalculatorEstimate your 10-year risk of heart attack or stroke with the ACC/AHA pooled coh
• 10-Year CV Risk CalculatorEnter your numbers and see how systolic blood pressure and diabetes move your 10
• 10-Year CVD Risk CalculatorEstimate 10-year cardiovascular risk from total cholesterol, HDL, blood pressure
• 10-Year CVD Risk CalculatorEstimate your 10-year risk of heart attack, stroke, heart failure or artery dise
• 10-Year Cardiac Risk CalculatorSee how your cholesterol drives your 10-year heart risk, then find out how much
• 10-Year Cardiovascular Risk CalculatorEnter age, sex, race, cholesterol and blood pressure to get your 10-year heart a
• 10-Year Fracture Risk CalculatorAnswer the FRAX style questions for a low, moderate or high 10-year fracture ban
• 10-Year Heart Risk CalculatorA blood pressure and lifestyle self check for 10-year heart risk, scored from ag
• 10-Year Risk CalculatorScore nine factors with the ACC/AHA pooled cohort equations, read your 10-year A
• 10-Year Stroke Risk CalculatorScore your 10-year stroke risk with the Framingham point tables: age, blood pres
• 10-Years ASCVD Risk CalculatorRun the 2013 pooled cohort equations step by step: age, cholesterol, HDL, blood
• 6-Minute Walk Test CalculatorEnter your six-minute walk distance in meters to see the percent predicted for y
• A1C to Blood Sugar CalculatorConvert an A1C result to an estimated average blood sugar in mg/dL or mmol/L, or
• Adjusted Body Weight CalculatorCalculate adjusted body weight from the Devine formula: IBW + 0.4 x (actual - IB
• Alcohol Units CalculatorConvert beer, wine and cocktails into US standard drinks of 0.6 oz, then estimat
• Army Body Fat CalculatorEstimate Army body fat with the one-site abdomen equation used since June 2023,
• BAC CalculatorEstimate blood alcohol content from your weight, sex, drinks and hours using the
• BMI CalculatorEnter height and weight in pounds or kilos to get your BMI, your CDC category, t
• BMI Calculator for Kids and TeensEnter age, sex, height and weight to get a child's BMI, the CDC BMI-for-age perc
• BMI Calculator for MenGet your BMI from height and weight in pounds and inches, see the CDC category,
• BMI Calculator for TeensEnter age, sex, height and weight to get a teen BMI, the CDC percentile and the
• BMI Calculator for WomenBMI calculator for women with CDC categories, healthy weight ranges by height, w
• BMI Calculator kgMetric BMI calculator in kilograms and meters using the WHO formula. Get your in
• BMI Chart for AdultsFind your BMI on a height and weight chart, see the CDC adult categories, the he
• BMI Prime CalculatorFree BMI Prime calculator: enter your height and weight to get your BMI, your BM
• BMI Weight Loss CalculatorFind your current BMI, the weight in the healthy range for your height, and how
• BMI in Pregnancy CalculatorFind your pre-pregnancy BMI and the weight gain range that goes with it, plus wh
• BMR CalculatorEstimate basal metabolic rate with Mifflin-St Jeor, Harris-Benedict and Katch-Mc
• BMR Katch-McArdle CalculatorEstimate BMR from lean body mass with the Katch-McArdle formula, see how a body
• BSA CalculatorFree body surface area calculator: enter height and weight to get BSA in square
• BUN to Creatinine Ratio CalculatorDivide BUN by creatinine to get the ratio, see whether it sits in the usual 10:1
• Baby Vaccine ScheduleSee which shots a baby gets at 2, 4, 6, 12, 15 and 18 months, how combination sh
• Bench Press CalculatorEstimate your bench press one rep max from reps at a lighter weight, see where y
• Blood Pressure Category CalculatorEnter a systolic and diastolic reading to see which of the five AHA categories i
• Blood Sugar to A1C CalculatorConvert an average blood sugar to an estimated A1C, or turn an A1C into average
• Blood Type CalculatorEnter both parents' blood types and Rh factors to see every blood type their chi
• Blood Type Compatibility ChartCheck blood type compatibility for red cells and plasma: pick a recipient and do
• Body Fat CalculatorEstimate body fat with a tape measure using the U.S. Navy formula for men and wo
• Body Fat Calculator for WomenEstimate your body fat percentage with a tape measure using the U.S. Navy formul
• Body Shape CalculatorFind your body shape from bust, waist and hips: hourglass, pear, apple, rectangl
• Body Surface Area CalculatorWork out body surface area from height and weight with four published formulas,
• Body Water CalculatorEstimate total body water in liters from weight, height, age and sex with the Wa
• Botox Cost CalculatorEstimate Botox costs by treatment area, units needed, and provider rate. Calcula
• Breastfeeding Calorie CalculatorBreastfeeding burns extra calories every day. Enter your baby's age and how much
• Calorie CalculatorFind the calories you need each day to lose, hold or gain weight. Mifflin-St Jeo
• Calorie Deficit CalculatorWork out your calorie deficit: enter your stats to get TDEE, a safe daily defici
• Calories Burned Biking CalculatorEstimate calories burned biking from body weight, distance, speed and ride type.
• Calories Burned CalculatorEstimate calories burned for 15 activities by weight and minutes, with MET value
• Calories Burned Running CalculatorFind the calories burned running by weight, distance and pace. 3 miles at a 10 m
• Calories to Joules ConverterConvert calories to joules with the exact 4.184 J factor, see kcal to kJ for foo
• Carbohydrate CalculatorEnter your daily calories and carb percentage to get carbohydrate grams. See how
• Child BMI CalculatorCalculate child BMI and CDC percentile by age and sex. Check underweight, health
• Child BMI Percentile CalculatorWork out your child's BMI percentile for age and sex using CDC growth data, with
• Cholesterol Ratio CalculatorEnter a lipid panel and get the total to HDL ratio, LDL to HDL, triglycerides to
• Conception Date CalculatorWork out when conception likely happened from a due date or a last period. A Jan
• Cost of Smoking CalculatorAdd up what smoking costs a pack a day, a decade and a working lifetime, includi
• Desk Height CalculatorEnter your height to get the desk height for sitting and standing, plus chair, k
• Due Date CalculatorEnter the first day of your last period and your cycle length to get an estimate
• FFMI CalculatorEnter weight, height and body fat to get lean mass, FFMI and FFMI normalized to
• Feet to Steps CalculatorConvert feet to walking steps using your height or a measured stride. 5,280 feet
• Gym Cost Per Visit CalculatorEnter your dues, joining fee and visits per week to see what each gym trip costs
• Harris-Benedict CalculatorCalculate BMR with the 1918 Harris-Benedict equation and the 1984 revision, in p
• Health CalculatorEnter age, sex, height, weight and activity to get BMI with its category, daily
• Heart Rate Zone CalculatorCalculate your 5 aerobic training heart rate zones using the Tanaka, Gellish, or
• Height CalculatorConvert height between feet, inches, centimeters and meters, and predict a child
• Height ConverterConvert a height between feet and inches, total inches, centimeters and meters,
• How Far Along Am I?Free pregnancy calculator: enter your last period or due date to see how many we
• How Long Does It Take to Lose 10 Pounds?A 500 calorie daily deficit takes 35,000 / 500 = 70 days, about 10 weeks, to los
• How Many Calories in a Beer?A 12 oz regular beer has about 153 calories, and most come from alcohol. Enter s
• How Much Fiber Per Day CalculatorFind your daily fiber target at 14 grams per 1,000 calories, then add foods to s
• Hydration CalculatorWork out how much water to drink each day from your body weight, exercise minute
• Ideal Weight CalculatorSee ideal body weight from four formulas (Devine, Robinson, Miller, Hamwi) side
• Incidence Rate CalculatorConvert new cases into an incidence rate per 1,000 or 100,000 person-years, or p
• Joules to Calories ConverterConvert joules to calories by dividing by 4.184 and food Calories by 4,184, with
• Lean Body Mass CalculatorGet lean body mass from height and weight with the Boer equation, plus James and
• Macro CalculatorGet daily protein, fat and carb grams from your weight, height, age and goal. Us
• Maintenance Calorie CalculatorFind the daily calories that hold your weight steady: Mifflin-St Jeor BMR, activ
• Max Heart Rate CalculatorCompare 220 minus age with the Tanaka, Nes and Gulati formulas for maximum heart
• Navy Body Fat CalculatorEstimate body fat with the Navy circumference method, run the 2026 waist-to-heig
• One Rep Max CalculatorEstimate your one rep max from a 3 to 10 rep set with the Epley, Brzycki, Lander
• Ovulation CalculatorEnter your last period and cycle length to get your ovulation date, your six-day
• Period CalculatorEnter the first day of your last period and your cycle length to get your next p
• Pregnancy CalculatorEnter a last period, conception date, IVF transfer or scan to get your due date,
• Pregnancy Week CalculatorWork out your pregnancy week and day from the first day of your last period, or
• Pregnancy Weight Gain CalculatorEnter your pre-pregnancy weight, height and week to see the recommended gain ran
• Protein CalculatorEnter your weight in pounds to get a daily protein target in grams, grams per po
• Protein Intake CalculatorFind your daily protein target in grams from body weight and training level, wit
• Push-Ups Calorie CalculatorSee calories burned doing push-ups: enter weight and minutes to get the burn at
• Quit Smoking Savings CalculatorSee what cigarettes cost you a week, a year and over ten years, then check the C
• RMR CalculatorEstimate resting metabolic rate three ways: Mifflin-St Jeor, Harris-Benedict rev
• Rucking Calorie CalculatorEstimate calories burned rucking from body weight, pack weight, speed, grade and
• Running Pace CalculatorConvert running pace between min per mile and min per km, see your finish time f
• Shot Cost CalculatorEstimate what vaccines cost with and without insurance: flu, shingles, HPV, Tdap
• Sleep CalculatorSet bedtime, alarm and minutes to fall asleep, then see the hours you get agains
• Sleep Cycle CalculatorFree sleep cycle calculator: enter your wake-up time or bedtime for the best tim
• Sleep Debt CalculatorAdd up the sleep you have missed over the last week or month, see it as a share
• Steps to Calories CalculatorConvert steps to calories by body weight and walking pace. See calories per step
• Sunscreen CalculatorWork out sunscreen by the ounce: 1 ounce per adult per application, reapplied ev
• TDEE CalculatorWork out your total daily energy expenditure from BMR and an activity multiplier
• Target Heart Rate CalculatorFind your Karvonen target heart rate zone, compare it with a plain percentage of
• VO2 Max CalculatorEstimate VO2 max from a Cooper 12-minute run, a 1.5-mile time, a Rockport walk o
• Waist to Height Ratio CalculatorDivide your waist by your height to get your ratio, the risk band, and the waist
• Waist-to-Hip Ratio CalculatorFree waist-to-hip ratio calculator: enter your waist and hip measurements in inc
• Walking Calorie CalculatorSee how many calories a walk burns from your weight, pace and minutes. A 180 pou
• Water Intake CalculatorGet a daily water target from your weight, exercise minutes and climate, split i
• Weight Loss CalculatorTurn a goal weight into a plan: pounds to lose, BMI now and at goal, the daily c
• Zone 2 Heart Rate CalculatorZone 2 heart rate calculator: get your aerobic base zone in bpm on the percent o

Health numbers are useful when you understand what they mean and where they stop. These calculators turn a few measurements into reference figures you can track over time, the kind a doctor or nurse would jot down. They are estimates for information, not a diagnosis, and they never replace a real medical check.

Turning measurements into useful numbers

Sleep runs in cycles of about 90 minutes, and the deep sleep that restores your body comes early in the night. If your alarm is set for 6:30 am and you take 15 minutes to fall asleep, five cycles back up to a 10:45 pm bedtime for 7.5 hours, while four cycles means 12:15 am.

• Calories: a 40-year-old woman at 180 lb doing light exercise needs about 2,067 calories a day to hold her weight, so a 500 calorie daily deficit targets about 1 lb a week.
• BMI and body fat: BMI Prime compares your BMI to the top of the healthy range, and the Navy tape method estimates body fat from waist and neck.
• Pregnancy: entering your last period shows how many weeks and days along you are and your due date.
• Blood sugar: an average glucose reading converts to an estimated A1C, and back again.

The mistake to avoid is reading one number as a verdict. A single BMI or body fat figure ignores muscle, frame and age, and trends over months tell you far more than any single day. If a number worries you, bring it to a clinician rather than acting on it alone.