Health calculators for everyday wellness decisions
Browse health tools for BMI, body composition, calories, macros, pregnancy, heart rate, blood pressure, sleep, fitness, conversions, and medical math. Every calculator page includes formulas, examples, result details, FAQs, and structured data.
Search by calculator name, topic, formula, or wellness goal.
Body metrics
8 calculators
BMI Calculator
Calculate body mass index from height and weight with adult BMI category guidance.
Open calculatorBody Fat Calculator
Estimate body fat percentage using common circumference-based methods.
Open calculatorBody Mass Calculator
Review body mass relative to height and common adult reference ranges.
Open calculatorLean Body Mass Calculator
Estimate lean body mass from weight and body fat percentage.
Open calculatorIdeal Weight Calculator
Estimate ideal body weight using common reference formulas.
Open calculatorAdjusted Body Weight Calculator
Estimate adjusted body weight from actual and ideal body weight.
Open calculatorWaist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio and review screening context.
Open calculatorWaist-to-Height Ratio Calculator
Compare waist circumference with height for a simple health ratio.
Open calculatorCalories and nutrition
10 calculators
BMR Calculator
Estimate basal metabolic rate using the Mifflin-St Jeor equation.
Open calculatorCalorie Calculator
Estimate daily calories for maintenance, weight loss, or weight gain.
Open calculatorTDEE Calculator
Calculate total daily energy expenditure from BMR and activity level.
Open calculatorMacro Calculator
Convert a calorie target into protein, carbs, and fat grams.
Open calculatorProtein Calculator
Estimate daily protein needs from body weight and goal.
Open calculatorCarbohydrate Calculator
Estimate carbohydrate grams from calorie and macro targets.
Open calculatorFat Intake Calculator
Estimate daily fat grams from calories and macro percentage.
Open calculatorWater Intake Calculator
Estimate daily water intake from body weight and activity.
Open calculatorWeight Loss Calculator
Estimate calorie targets and timeline for weight loss goals.
Open calculatorWeight Gain Calculator
Estimate calorie surplus and timeline for weight gain goals.
Open calculatorPregnancy
7 calculators
Pregnancy Calculator
Estimate due date and pregnancy timeline from last menstrual period.
Open calculatorDue Date Calculator
Calculate an estimated due date from LMP or conception timing.
Open calculatorConception Calculator
Estimate likely conception timing from due date or LMP.
Open calculatorGestational Age Calculator
Estimate gestational age in weeks and days from LMP.
Open calculatorOvulation Calculator
Estimate ovulation day and fertile window from cycle length.
Open calculatorFertility Calculator
Estimate fertile window dates from menstrual cycle information.
Open calculatorPeriod Calculator
Predict next period and cycle timing from average cycle length.
Open calculatorHeart and vitals
6 calculators
Heart Rate Calculator
Estimate maximum heart rate and exercise training zones.
Open calculatorTarget Heart Rate Calculator
Calculate target heart rate zones for cardio training.
Open calculatorResting Heart Rate Calculator
Review resting heart rate against general adult ranges.
Open calculatorBlood Pressure Calculator
Classify blood pressure readings using common adult thresholds.
Open calculatorMAP Calculator
Calculate mean arterial pressure from systolic and diastolic blood pressure.
Open calculatorPulse Pressure Calculator
Calculate pulse pressure from systolic and diastolic readings.
Open calculatorFitness
7 calculators
Running Pace Calculator
Calculate running pace, speed, and finish-time estimates.
Open calculatorWalking Pace Calculator
Calculate walking pace and estimated completion time.
Open calculatorCycling Pace Calculator
Estimate cycling speed, pace, and ride time from distance.
Open calculatorSteps to Miles Calculator
Convert steps to miles or kilometers using stride length.
Open calculatorCalories Burned Calculator
Estimate calories burned from activity, body weight, and duration.
Open calculatorOne Rep Max Calculator
Estimate one-rep max from lifted weight and repetitions.
Open calculatorVO2 Max Calculator
Estimate VO2 max using simple heart-rate and fitness inputs.
Open calculatorSleep
3 calculators
Everyday health
4 calculators
Age Calculator
Calculate exact age from a birth date with years, months, days, total days, and next-birthday timing.
Open calculatorHeight Converter
Convert height between feet, inches, centimeters, and meters.
Open calculatorWeight Converter
Convert body weight between pounds, kilograms, and stones.
Open calculatorTemperature Converter
Convert body temperature between Fahrenheit and Celsius.
Open calculatorMedical math
6 calculators
Medication Dosage Calculator
Calculate weight-based dosage math for educational checking.
Open calculatorPediatric Dose Calculator
Estimate weight-based pediatric dose math for educational use.
Open calculatorIV Drip Rate Calculator
Calculate IV drip rate from volume, time, and drop factor.
Open calculatorCreatinine Clearance Calculator
Estimate creatinine clearance using common clinical math.
Open calculatoreGFR Calculator
Estimate kidney filtration using simplified educational inputs.
Open calculatorChild Growth Percentile Calculator
Estimate child growth percentile context from age and measurement.
Open calculatorRisk and wellness
3 calculators
Smoking Pack Years Calculator
Calculate smoking pack-years from packs per day and years smoked.
Open calculatorAlcohol Unit Calculator
Estimate alcohol units from drink volume and alcohol percentage.
Open calculatorCaffeine Calculator
Estimate caffeine intake by body weight and serving amount.
Open calculator