Health
Simple body estimates on this device. Not medical advice.
Age Calculator
Years, months, and days from a birth date.
BMI Calculator
Body mass index in metric or imperial units.
Calorie Calculator
BMR, TDEE, and a daily calorie target.
Water Intake Estimate
Daily water estimate from weight and climate.
Heart Rate Zones
Fox 220 minus age, then percent bands.
Waist-Hip Ratio
Waist/hip ratio with sex-aware tip.
Protein Target
Protein grams and ounces from body weight.
Body Surface Area
BSA with cm² and Mosteller label.
Ideal Body Weight
Devine IBW with lb and sex.
Waist to Height
Waist centimetres over height centimetres.
Max Heart Rate
Estimate max HR with Fox, Tanaka, Gulati, or Oakland.
Lean Body Mass
Boer estimate from mass, height, and sex.
Mean Arterial Pressure
MAP with low/normal/high tip.
Calorie Deficit
Deficit with weekly and weeks/kg.
Karvonen Heart Rate
Target pulse from rest, max, and intensity.
Pulse Pressure
Pulse pressure with narrow/wide tip.
Fat Mass
Fat mass with lean kg.
Carb Target
Carb target with oz.
Adjusted Body Weight
IBW plus 40 percent of extra weight.
One-Rep Max
1RM via Epley or Brzycki; shows formula used.
Target Heart Rate %
Target HR with max and %.
BMR (Mifflin)
Mifflin–St Jeor basal metabolic rate.
TDEE (Mifflin)
BMR times an activity factor.
Steps to Calories
Step kcal estimate plus distance in km.
Sleep Debt
Target minus actual hours over days.
FFMI
Fat-free mass index from weight and body fat %.
Relative Fat Mass
RFM from height, waist, and sex.
BMI Category
WHO BMI category with range tip.
Steps to km
Steps to km with meters.
km to Steps
Km to steps with stride.
Hydration Glasses
Hydration glasses with ml.
Macro Split Grams
Calories to protein/carb/fat grams.
Lean Mass from BF%
Lean and fat mass from body-fat %.
Height ft/in
Feet and inches to centimeters.
METs Calories
Estimate kcal from METs.
Pace min/km
Minutes per kilometer pace.
Sleep Cycle Count
Sleep cycles with configurable cycle length.
BMI Prime
BMI ÷ 25 with relative tip.
Weight Delta from kcal
kcal ↔ kg/lb plus days at 500 kcal/day.
Stride Length cm
Estimate stride from height.
Parent Height Predictor
Estimate adult height from parents.
Cockcroft–Gault CrCl
Estimate creatinine clearance.
Fetal Weight (Hadlock)
Estimate fetal weight from BPD, AC, FL.
P/F Ratio
PaO2/FiO2 with ARDS banding.
Blood Pressure Category
Adult ACC/AHA 2017 banding.
Due Date
Naegele due date from LMP.
Pediatric Dose
Young’s rule from adult dose and age.
Bilirubin Check
Compare to adult or neonate limit.
Blood Glucose Units
Convert mmol/L ↔ mg/dL.
eGFR (CKD-EPI 2021)
Estimate GFR from creatinine, age, sex.
Meal Insulin Estimate
Correction plus carb dose.
Height–Weight Table
BMI weight band with height meters and span.
Pregnancy Week
Gestational age from LMP.
Life Expectancy (Rough)
Years remaining from a simple table.
Pregnancy Weight Gain
IOM-style gain range by pre-BMI and week.