Health & Fitness Calculators
Health calculators for BMI, calories, body fat, pregnancy, sleep and fitness tracking.
148 calculators
10,000 Steps a Day Calculator — Miles, Calories & Time
Free 10,000 steps calculator: convert steps to miles and km, estimate calories burned and walking time, and track your daily steps-goal progress.
A1c Calculator — A1c to Average Glucose (eAG)
Free A1c calculator: convert HbA1c % to estimated average glucose (eAG) in mg/dL or mmol/L, or convert your average glucose back to A1c.
ABSI Calculator — A Body Shape Index & Mortality Risk
Free ABSI calculator estimates your A Body Shape Index from waist, height and weight, then stratifies abdominal-obesity mortality risk beyond BMI alone.
Acetaminophen Dosage Calculator by Weight
Pediatric acetaminophen (Tylenol) dose calculator by weight: mg and mL per dose for 160mg/5mL liquid, plus safe 24h max.
Age in Months Calculator — Baby's Exact Months
Free age-in-months calculator: turn any birth date into completed months, years+months, and decimal years. Includes corrected age for premature babies.
Age in Weeks Calculator — Weeks Lived Since Birth
Free age-in-weeks calculator: turn any birth date into completed weeks alive, plus total days, years, months and corrected weeks for premature babies.
Alcohol Calorie Calculator — kcal per Drink & Weekly Total
Free alcohol calorie calculator: estimate kcal from ethanol in beer, wine, or spirits using ABV and volume. See weekly, monthly, and yearly totals.
Alcohol Unit Calculator — UK Units & Weekly Intake
Free alcohol unit calculator: convert drink volume and ABV into UK units, estimate weekly intake, and compare against the 14-unit NHS drinking guideline.
Am I Pregnant Calculator — Early Symptom Quiz
Free am I pregnant quiz: score 5 early signs (missed period, nausea, tender breasts, fatigue, frequent urination) and estimate pregnancy likelihood.
ASCVD Risk Calculator — 10-Year Heart Risk Estimator
Estimate your 10-year heart attack and stroke risk with the AHA ACC pooled cohort equations. See your low, intermediate, or high ASCVD risk category.
Baby Gender Calculator — Chinese Calendar & Shettler
Free baby gender predictor using the Chinese birth calendar and Shettler method. Just for fun — not medical advice or a scientific prediction.
Baby Height Percentile Calculator (WHO)
Baby height percentile calculator using WHO growth standards. Enter sex, age and recumbent length to get the length-for-age percentile and z-score.
Baby Length Calculator — Fetal Growth by Week
Estimate baby length in cm and inches by gestational week, plus fundal height (McDonald's rule) and current trimester. Fast and private.
Baby Month Calculator — Weeks, Days & Milestones
Convert baby age in months to weeks and days, see newborn/infant/toddler stage, and find developmental milestones by month.
Baby Percentile Calculator (WHO Growth Charts)
Baby percentile calculator using WHO growth charts: enter sex, age, weight and length for weight-for-age, length-for-age and weight-for-length percentiles.
Baby Size Calculator by Week (Fruit Comparison)
Free baby size calculator by week: estimated fetal length in cm and inches, your trimester, days to due date, and how your ultrasound compares to the average.
Baby Weight Percentile Calculator (WHO)
Baby weight percentile calculator using WHO growth standards. Enter sex, age in months and weight to find the weight-for-age percentile and z-score.
BAC Calculator — Estimate Blood Alcohol Content
Free BAC calculator estimates blood alcohol content with the Widmark formula. Enter weight, sex, alcohol and hours to see your BAC vs the 0.08 limit.
Bedtime Calculator — Find Your Best Sleep & Wake Time
Enter your wake-up time to get the best bedtimes for 4, 5, or 6 full 90-minute sleep cycles, including a 15-minute fall-asleep buffer.
Blood Alcohol Calculator — Widmark BAC Estimate
Estimate blood alcohol content (BAC) with the Widmark formula. See when you sober up, your driving status, and how drinks, weight, sex and time change it.
Blood Pressure Calculator — AHA/ACC Category & MAP
Free blood pressure calculator. Enter systolic and diastolic readings to get your AHA/ACC category, MAP, and pulse pressure instantly.
Blood Pressure Categories Calculator — AHA/ACC Chart
Free blood pressure categories calculator: enter systolic and diastolic readings to see your AHA/ACC hypertension category, MAP and pulse pressure.
Blood Sugar Calculator — HbA1c & Glucose Converter
Free blood sugar calculator: convert mg/dL to mmol/L, estimate HbA1c and eAG, and check fasting, pre- and post-meal glucose ranges.
BMI Calculator — Body Mass Index for Adults
Free adult BMI calculator. Enter height in cm or inches and weight in kg or lbs to get your BMI number and NIH/WHO weight category instantly.
BMI for Boys Calculator (CDC Percentile)
Free BMI for boys calculator. Enter your son's age, weight in lbs, and height in inches to get BMI, CDC percentile, weight status, and healthy weight.
BMI for Girls Calculator (CDC Percentile)
Free BMI for girls calculator. Enter your daughter's age, weight in lbs, and height in inches to get her BMI, CDC percentile, and weight status instantly.
Imperial BMI Calculator — Feet, Inches & Pounds
Free imperial BMI calculator. Enter height in feet and inches and weight in pounds to get your BMI, NIH/WHO category and healthy weight range instantly.
BMI Calculator for Kids (Ages 2-19) with CDC Percentiles
BMI calculator for kids ages 2-19. Enter sex, age, weight in kg and height in cm to get pediatric BMI and the CDC BMI-for-age percentile.
BMI Calculator for Men — Imperial lbs & Inches
Free BMI calculator for men using pounds and inches. Enter weight and height in feet/inches to get your BMI, category, BMI Prime, and healthy weight range.
Metric BMI Calculator — cm & kg for Adults
Free metric BMI calculator. Enter height in centimeters and weight in kilograms for your BMI, WHO/NIH category and healthy weight range instantly.
BMI Prime Calculator — Healthy Weight Ratio
Free BMI Prime calculator: divide your BMI by 25 to see how close you are to the upper-normal weight limit and the weight needed to reach a Prime of 1.0.
BMI Calculator for Women — Healthy Weight in lbs
Free BMI calculator for women. Enter weight in lbs and height in inches to get your female BMI, NIH category, and the healthy 18.5-24.9 weight range.
BMR Calculator — Resting Metabolic Rate (Mifflin-St Jeor)
Free BMR calculator using the Mifflin-St Jeor equation. Enter age, sex, height and weight to estimate resting calories burned per day.
BMR to TDEE Calculator — Daily Calorie Burn
Convert BMR to TDEE with the Mifflin-St Jeor equation. Enter age, sex, height, weight and activity level to estimate your maintenance calories per day.
Body Fat Calculator — US Navy Tape-Measure Method
Free body fat calculator using the US Navy tape-measure method. Enter gender, height, neck, waist, hip and weight to estimate body fat % and lean mass.
Body Fat Percentage Calculator — US Navy Metric Method
Estimate body fat percentage from waist, neck and height in centimeters using the US Navy circumference method, with your category vs healthy ranges.
Body Shape Calculator — Apple, Pear, Hourglass & Ruler
Body shape calculator: enter shoulder, waist and hip measurements to classify apple, pear, hourglass, ruler or inverted triangle, plus waist-to-hip ratio.
Body Shape Index Calculator (ABSI) & Mortality Risk
Free body shape index (ABSI) calculator: enter waist, height and your known BMI to estimate abdominal-adiposity score and relative mortality risk.
Breastfeeding Calorie Calculator — Nursing Mom's Target
Free breastfeeding calorie calculator: add the ACOG ~500 k/day lactation allowance to your TDEE and set a safe postpartum weight-loss target.
Caffeine Calculator — Daily Intake vs 400mg Limit
Free caffeine calculator: add your coffee, espresso, tea, soda and energy drinks to see total mg and how it compares with the FDA 400 mg daily safe limit.
Calorie Burn Calculator: kcal Burned per Activity
Free calorie burn calculator estimates kcal burned for any exercise using the MET formula: kcal = MET x body weight (kg) x duration in hours.
Calorie Calculator — Daily TDEE & Weight-Loss Targets
Free calorie calculator: estimate your BMR and daily TDEE from age, sex, height, weight and activity, then set a 500 kcal cut or bulk goal.
Calorie Deficit Calculator — Daily & Weekly Weight Loss
Free calorie deficit calculator: enter TDEE and target daily intake to see daily kcal deficit and weekly/monthly/yearly weight loss in pounds.
Calorie Needs Calculator — Daily TDEE & Goal Intake
Free calorie needs calculator: estimate your BMR and TDEE with the Mifflin-St Jeor equation, then see the daily calories to maintain, lose, or gain weight.
Calories a Day Calculator — Daily Maintenance Intake
Free calories-a-day calculator: estimate daily maintenance, weight-loss, or weight-gain intake using the Mifflin-St Jeor equation in pounds and inches.
Carb Calculator — Daily Carb Grams & Meal Targets
Free carb calculator: convert daily calories into grams of carbs per day and per meal. Uses the 4 kcal/g rule and a diabetes 45-60 g per meal target.
Child BMI Calculator (Ages 2–19)
Child BMI calculator for ages 2-19. Enter age, height and weight in lbs and inches to compute BMI using the standard formula BMI = weight / height^2 x 703.
Cholesterol Ratio Calculator (Total / HDL)
Free cholesterol ratio calculator: compute your total-to-HDL ratio, non-HDL cholesterol, and LDL/HDL risk category from a lipid panel.
Conception Calculator: Likely Conception Date & Window
Estimate your likely conception date and narrow fertilization window (ovulation +/-2 days) from your last period date and cycle length.
Conception Calendar Calculator — Fertile Days & Due Date
Map your fertile window, ovulation day, and projected due date across upcoming cycles. Free conception calendar planner for trying-to-conceive couples.
Cooking Conversion Calculator — Cups, tbsp, oz & Grams
Free cooking conversion calculator: convert cups to ml, tablespoons to grams, ounces to liters and more. Exact US culinary factors for recipes.
Creatine Calculator — Dose, Loading Phase & Monthly Cost
Free creatine monohydrate calculator: 20g/day loading for 5 days, 3-5g/day maintenance, daily water, scoops per tub and monthly cost.
Creatinine Calculator — eGFR & CKD Stage (CKD-EPI 2021)
Estimate eGFR from serum creatinine with the CKD-EPI 2021 equation, then see your CKD stage and what a normal creatinine level means.
Devine Formula Calculator: Ideal Body Weight (lbs & kg)
Free Devine formula calculator for ideal body weight. Enter height and sex to get your target weight in lbs and kg and compare your actual BMI.
Diabetes Risk Calculator — ADA Type 2 Screening Test
Free ADA-style diabetes risk test: score your Type 2 diabetes risk from age, BMI, family history, activity and blood pressure in 30 seconds.
Dosage by Weight Calculator (mg/kg Dose)
Free dosage-by-weight calculator: enter body weight and the mg/kg dose to get mg per dose, the safe 24-hour max, liquid mL volume, and max doses per day.
Due Date by Conception Calculator — From Conception Date
Calculate your pregnancy due date from a known conception date (conception + 266 days, 38 weeks), with current pregnancy week and days until delivery.
Due Date Calculator — Estimate Pregnancy Delivery Date
Free due date calculator: estimate your baby's EDD from your last menstrual period (LMP) and cycle length, plus your current pregnancy week.
eGFR Calculator — CKD-EPI 2021 Kidney Function
Free eGFR calculator uses the race-free CKD-EPI 2021 equation to estimate kidney function from creatinine, age and sex, then maps your CKD stage.
Fat Loss Calculator — Project Weight Over Weeks
Free fat loss calculator: enter your current weight, daily calorie deficit and weeks to estimate pounds of fat lost and your projected target-date weight.
Fertile Window Calculator: Ovulation & Fertile Days
Free fertile window calculator: find your 6-day fertile window, ovulation day, and peak conception days from your last period date and cycle length.
Fertility Calculator: Ovulation, Fertile Days & Due Date
Free fertility calculator: estimate your ovulation day, fertile window, peak conception days and due date from your last period and cycle length.
Fiber Calculator — Daily Fiber Intake Target
Free fiber calculator: estimate your daily dietary fiber target by age and sex, then see how many fruit, vegetable and legume servings close the gap.
Food Calorie Calculator — Calories & Macros by Weight
Free food calorie calculator: pick a food, enter grams, and get instant kcal plus protein, carbs and fat macros from USDA nutrition data.
Framingham Risk Calculator — 10-Year CHD Score
Free Framingham risk score calculator: estimate your 10-year heart attack risk from age, cholesterol, HDL, blood pressure, smoking and treatment status.
FSA Calculator — Tax Savings & Paycheck Impact
Free FSA calculator: estimate annual pre-tax contributions, federal + FICA tax savings, and paycheck reduction under the 2025 IRS $3,300 limit.
GFR Calculator — Cockcroft-Gault Creatinine Clearance
GFR calculator uses the Cockcroft-Gault equation to estimate creatinine clearance from age, weight, serum creatinine and sex, then maps your CKD stage.
Glucose Conversion Calculator — mg/dL to mmol/L
Instant glucose converter: switch blood sugar between mg/dL and mmol/L and convert HbA1c% to estimated average glucose (eAG) in both units.
Gym Calorie Calculator: kcal Burned Per Workout
Free gym calorie calculator estimates kcal burned per session: lifting, running, cycling, swimming and HIIT, using MET values and body weight in pounds.
Hamwi Formula Calculator: Ideal Body Weight
Free Hamwi formula calculator: enter sex and height in inches to get ideal body weight in lbs and kg, a +/-10% frame-size range, and a Devine comparison.
Harris-Benedict Calculator — BMR & TDEE
Free Harris-Benedict calculator: estimate your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) from age, sex, height and weight.
LDL to HDL Ratio Calculator (Heart Disease Risk)
Free LDL/HDL ratio calculator: divide LDL by HDL cholesterol to estimate heart-disease risk. Also shows total/HDL ratio and non-HDL cholesterol.
Heart Disease Risk Calculator — 10-Year & Lifetime
Estimate your 10-year and lifetime risk of heart attack and stroke with the AHA/ACC pooled cohort equations. See your low, intermediate, or high risk.
Heart Rate Calculator — Max & Target Zones
Free heart rate calculator: estimate your maximum heart rate (220 minus age) and your 50–85% target training zones for cardio, fat burn and endurance.
Hours of Sleep Calculator — Actual Sleep & Debt
Free hours of sleep calculator: turn bedtime and wake-up time into real sleep hours, 90-minute cycles, and weekly sleep debt versus expert recommendations.
HSA Calculator — Tax Savings & Growth Projection
Free HSA calculator: estimate annual tax savings, IRS 2025/2026 contribution limits, catch-up amounts, and projected tax-free retirement growth.
Hydration Calculator — Daily Water Intake by Weight
Free hydration calculator: estimate how many fl oz, cups and liters of water you need daily from your body weight, exercise and climate.
Hypertension Risk Calculator — Stage & 10-Year Risk
Classify your blood pressure stage and estimate your 10-year cardiovascular risk from age, cholesterol, HDL, smoking, diabetes, and family history. Free.
IBR Calculator — Income-Based Repayment Estimator
Free IBR calculator: estimate your monthly Income-Based Repayment payment from loan balance, AGI, family size and rate. See the 10-year standard cap.
Ibuprofen Dosage Calculator by Weight
Free ibuprofen (Advil/Motrin) dose calculator by weight: get mg and mL per dose for 100 mg/5 mL children's suspension, plus the safe 40 mg/kg/day max.
Ideal Body Weight Calculator (Devine Formula)
Free ideal body weight calculator using the Devine formula. Estimate your healthy weight in lbs and kg by height and sex, with a +/-10% range.
Ideal Weight Calculator: Devine Formula (lbs & kg)
Free ideal weight calculator using the Devine formula. See your healthy body-weight target in lbs and kg by height and sex, with a ±10% range.
IVF Due Date Calculator — Embryo Transfer EDD
Free IVF due date calculator: get your baby's EDD and pregnancy week from a fresh or frozen embryo transfer (day-3 cleavage or day-5 blastocyst).
Jet Lag Calculator — Recovery Days & Light Plan
Free jet lag calculator: estimate how many days to recover after crossing time zones, east vs west, with a timed light-exposure plan to adjust faster.
Karvonen Calculator: Heart Rate Reserve Zones
Free Karvonen calculator: estimate target heart rate zones from age and resting heart rate using heart rate reserve. Train at 50% to 85% intensity.
Keto Macro Calculator — Carbs, Protein & Fat for Ketosis
Free keto macro calculator: turn your TDEE into daily carbs, protein and fat grams with the standard 5-10%/20-25%/70-75% ketogenic split, plus net carbs.
Lean Body Mass Calculator — LBM & Fat Mass
Free lean body mass calculator: enter weight and body fat percentage to get your fat-free mass, fat mass, and kg/lb breakdown.
Liver Fat Calculator: Fatty Liver Index (FLI)
Estimate your Fatty Liver Index (FLI) and NAFLD risk from BMI, waist circumference, GGT and triglycerides. Free, instant and evidence-based.
LMP Due Date Calculator — Naegele Rule EDD
Free LMP due date calculator: estimate your baby's EDD from the first day of your last period using Naegele's rule, plus key prenatal milestone dates.
Macro Calculator — Daily Protein, Carbs & Fat
Free macro calculator: turn your daily calorie target into grams of protein, carbs and fat with the 4/4/9 rule. Set your own percent split.
Maintenance Calorie Calculator — Daily TDEE Set-Point
Free maintenance calorie calculator: find the exact daily TDEE to hold your weight steady, with a ±10% accuracy band plus weekly and monthly totals.
Max Heart Rate Calculator — HRR Training Zones by Age
Free max heart rate calculator: estimate max HR (220 minus age) and Karvonen heart-rate-reserve training zones at 50-85% using your resting HR.
Medicare Calculator — Part B, D & IRMAA Costs
Free 2025 Medicare calculator: estimate Part B, Part D premiums and IRMAA surcharges from MAGI and filing status. See monthly and annual costs.
Medication Dosage Calculator (mg/kg to mL)
Free medication dosage calculator: enter body weight and mg/kg/day to get total daily mg, per-dose mg, liquid mL, and tablet count for adults and children.
MET Calculator: Metabolic Equivalent & Calories Burned
Free MET calculator turns any activity into metabolic equivalents, MET-minutes, and calories burned using the Compendium of Physical Activities formula.
mg/dL to mmol/L Calculator — Blood Unit Converter
Convert blood-test results from mg/dL to mmol/L instantly. Built-in factors for glucose, cholesterol, triglycerides, uric acid and bilirubin, plus custom.
Nap Calculator — Best Nap Length & Wake Time
Free nap calculator: pick the ideal power-nap or 90-minute cycle, factor in sleep latency, avoid sleep inertia, and see your exact wake-up time.
Nicotine Calculator — Daily Milligram Intake & Gum Dose
Free nicotine calculator estimates daily mg intake from cigarettes, vaping and gum, plus the 2mg gum pieces needed to taper a pack-a-day habit.
Overhead Press Calculator — 1RM, Training Weights & Progress
Estimate your overhead press 1RM with the Epley formula, get 5x5 and 80% training weights, press-to-bodyweight ratio, and 12-week progression projections.
Ovulation Calculator: Fertile Window & Ovulation Day
Free ovulation calculator: estimate your ovulation day, fertile window, and next period from your last period date and cycle length. Plan conception.
Ovulation Calendar Calculator: Fertile Day Planner
Free ovulation calculator: estimate your ovulation day and fertile window from your last period using the calendar rhythm method. Plan conception by cycle day.
Ovulation Predictor Calculator: Fertile Window & Cycle
Free ovulation predictor: estimate your ovulation day, fertile window, and next period from your last period date and cycle length.
Running Pace Calculator — Min/Mile, Min/Km & MPH
Free running pace calculator: convert any distance and finish time into min/mile, min/km, and mph. Ideal for marathon, 5K, and 10K pacing.
Paracetamol Dosage Calculator by Weight (mg & Tablets)
Free paracetamol (acetaminophen) dose calculator by body weight: 15 mg/kg per dose, the safe 24-hour maximum, and how many 500 mg tablets each dose needs.
Pediatric BMI Calculator with CDC Percentiles
Pediatric BMI calculator for kids ages 2-19. Enter sex, age, weight in kg and height in cm to get BMI plus the CDC percentile weight band.
Period Calculator: Predict Next Period & Cycle Days
Free period calculator predicts your next period start, current cycle day, period end, and fertile window from your last period and cycle length.
PMS Calculator — Symptom Window & Intensity Estimator
Free PMS calculator: estimate your premenstrual window (7 days before your period) and symptom intensity from stress, sleep, exercise and caffeine.
Pregnancy Calculator — Estimated Due Date by LMP
Free pregnancy calculator: estimate your due date, conception date and trimester milestones from your last menstrual period (LMP) and cycle length.
Pregnancy Gender Calculator — Chinese Chart, Ramzi & Nub
Free pregnancy gender predictor: Chinese lunar birth chart, Ramzi placenta theory and nub/skull theory. Just for fun — not medical advice or a guarantee.
Pregnancy Month Calculator — Weeks to Months
Free pregnancy month calculator: convert weeks pregnant into exact calendar months, see your trimester and the percent of pregnancy complete.
Pregnancy Week Calculator (What Week Am I)
Free pregnancy week calculator: see exactly what week and trimester you are in, your days pregnant, progress %, and estimated due date from your LMP.
Pregnancy Weight Gain Calculator — IOM Targets by BMI
Free pregnancy weight gain calculator: IOM/ACOG recommended total gain by pre-pregnancy BMI, weekly 2nd/3rd-trimester rate, and on-track check.
Protein Calculator — Daily Grams for Activity & Goals
Free protein calculator: estimate daily protein grams from your body weight, activity level, and goals — building muscle, losing fat, or staying active.
Protein Intake Calculator — Daily Grams by Goal & Weight
Calculate how much protein you need per day from your weight and goals. Get daily grams plus per-meal targets for lifters, dieters, and active adults.
Protein Powder Calculator: Daily Scoops & Monthly Cost
Free protein powder calculator: find how many scoops close your daily protein gap, plus cost per serving, daily powder cost, and monthly tub budget.
REM Sleep Calculator: How Much REM Sleep Do You Get?
Free REM sleep calculator: estimate how much REM sleep you get from your total sleep time and 90-minute cycles, and what that means for memory and dreams.
Rest Day Calorie Calculator — Off-Day TDEE vs Training Days
Free rest-day calorie calculator: compare sedentary off-day TDEE against training-day burn, then see the daily gap and weekly average target.
Running Calorie Calculator — kcal Burn by Mile & Pace
Free running calorie calculator: estimate kcal burned per run from your weight, distance and pace. See marathon, 5K and half-marathon burn instantly.
Running Pace Calculator — Min/Mile, Min/Km & Predictions
Free running pace calculator: convert distance and finish time into min/mile, min/km, and mph, then predict 5K, 10K, half, and marathon times with Riegel.
Saturated Fat Calculator — Daily Limit in Grams
Free saturated fat calculator: compare daily grams to the USDA 10%-of-calories limit, see percent of budget used, and check cholesterol vs 300 mg.
Sleep Calculator: Best Bedtime & Wake-Up Time by Cycle
Free sleep cycle calculator: find your best bedtime or wake-up time from 90-minute sleep cycles, accounting for how long it takes you to fall asleep.
Sleep Cycle Calculator — Find Your Exact Bedtime
Free sleep cycle calculator: enter your wake time and pick 4-7 cycles to get your exact bedtime, with fall-asleep latency and total sleep hours.
Sleep Debt Calculator — Hours You Owe This Week
Free sleep debt calculator: estimate your weekly sleep deficit, weekend catch-up, and remaining debt. See how many extra nights you need to fully recover.
Sleep Need Calculator — Time in Bed by Age
Free sleep need calculator: NSF 7-9h adult range, athlete 8-10h, sleep-efficiency-adjusted time in bed and 90-minute cycles for your age group.
Sodium Calculator — Daily Intake vs AHA & USDA Limit
Free sodium calculator: compare daily intake to USDA 2,300 mg and AHA 1,500 mg limits, convert to salt grams, and see weekly allowance.
Squat Calculator — Estimate Your Back Squat 1-Rep Max
Free squat 1RM calculator: estimate your back squat one-rep max from weight and reps with the Epley formula, plus training weights and bodyweight ratio.
Standard Drink Calculator — US 0.6-oz Drinks & BAC
Free US standard drink calculator: convert drink volume and ABV into 0.6-oz standard drinks, estimate BAC with the Widmark formula, and see hours to sober.
Steps to Miles Calculator — Distance & Calories Burned
Free steps-to-miles calculator: convert your daily steps into miles, kilometers, and calories burned using your stride length and body weight.
Steps to Calories Calculator — Walking Calorie Burn
Free steps-to-calories calculator: estimate how many calories you burn walking 10,000 steps or any step count, adjusted for your body weight.
Steps to km Calculator — Convert Steps to Kilometers
Free steps-to-km calculator: convert your daily step count into kilometers from your stride length. See how far 10,000 steps is in km instantly.
Steps to Miles Calculator — Free Step Converter
Free steps-to-miles calculator: convert daily steps into miles and km using the standard 2,000 steps = 1 mile rule, with an adjustable stride.
Stroke Risk Calculator — Framingham 10-Year Score
Free Framingham stroke risk calculator: estimate your 10-year and lifetime stroke chance from age, blood pressure, cholesterol, smoking, diabetes and AFib.
Sugar Calculator: Grams to Teaspoons & Daily Limit
Free added sugar calculator: convert grams of sugar to teaspoons and compare your intake against WHO 5%/10% calorie limits and AHA sex-specific limits.
Supplement Timing Calculator — Protein, Creatine & Caffeine
Schedule protein (30-min post-workout), creatine (daily), omega-3 (with meals), vitamin D (morning) and caffeine (60-min pre-workout).
Swim Pace Calculator — Pace per 100m / 100yd
Free swim pace calculator: convert any swim distance and time into pace per 100m or 100yd, with lap splits and average speed.
Target Heart Rate Calculator — Zones by Age
Free target heart rate calculator: get AHA moderate (50–70%) and vigorous (70–85%) zones plus your Karvonen heart-rate-reserve target by age.
TDEE Calculator — Total Daily Energy Expenditure
Free TDEE calculator: Mifflin-St Jeor BMR times an activity factor. Enter age, sex, height, weight and activity level to estimate your daily calorie burn.
Toddler BMI Calculator with CDC Percentiles
Free toddler BMI calculator in pounds and inches. Enter age, sex, weight and height to get a toddler BMI score and the CDC weight-status percentile.
Ultrasound Due Date Calculator — CRL Scan EDD
Free ultrasound due date calculator: estimate EDD from your scan date and crown-rump length (CRL mm), or the gestational age your sonographer reported.
Visceral Fat Calculator — Estimate VFA Area
Free visceral fat calculator: estimate your VFA (cm²) from waist circumference and BMI, see your cardiometabolic risk band and target waist.
VO2 Max Calculator — Cooper Test & Rockport Walk
Free VO2 max calculator: estimate aerobic fitness from the Cooper 12-minute run or Rockport 1-mile walk test. Instant score with age/gender rating.
Waist Circumference Risk Calculator (WHO Cutoffs)
Free waist circumference risk calculator: check abdominal obesity risk using WHO male 94/102 cm and female 80/88 cm cut-points, in cm or inches.
Waist-to-Height Ratio Calculator (Healthy < 0.5)
Free waist-to-height ratio calculator: divide waist by height, check the 0.5 healthy cut-point, and see your recommended max waist in cm or inches.
Waist-to-Hip Ratio Calculator (WHR Health Check)
Free waist-to-hip ratio calculator: compute your WHR, WHO abdominal-obesity risk, and waist-to-height ratio for men and women.
Wake-Up Calculator — Best Time to Wake Up from Bedtime
Enter your bedtime to get the best wake-up times for 4, 5, or 6 full 90-minute sleep cycles, including a 15-minute fall-asleep buffer so you wake rested.
Walking Calorie Calculator — kcal Burn by Pace & Time
Free walking calorie calculator: estimate kcal burned on any walk from your weight, pace and duration. See 30-min, 5K and 10,000-step walks instantly.
Water Intake Calculator — Daily Hydration Needs
Free water intake calculator: estimate your daily hydration needs in ml and fl oz from body weight, exercise minutes and hot weather.
Weight Loss Calculator — Time to Reach Your Goal Weight
Free weight loss calculator: enter current weight, goal weight, and daily calorie deficit to see how many weeks until you hit your target.