Health Tools

Body Mass Index with WHO category — underweight, normal, overweight, obese.

Devine, Robinson, and Miller formulas for ideal body weight — side by side.

US Navy method (waist + neck + hip) and BMI method side-by-side.

LBM estimate using the Boer formula — weight minus fat mass.

Cardiovascular risk indicator — waist circumference ÷ hip circumference.

Daily calorie needs using Mifflin-St Jeor + activity level.

Daily protein target by weight, activity, and goal.

Daily hydration needs by bodyweight + exercise + climate.

Estimate your 1RM from any rep set using Epley, Brzycki & Lombardi formulas — plus a strength % chart.

Calories burned during exercise — uses MET values for 18 common activities + your bodyweight.

Pace, speed, and split times from any distance + time — works for both km and miles.

Your 5 training zones using the Karvonen formula — accounts for your resting heart rate, not just age.

Estimate your VO2 max from a 12-minute all-out run, with age- and gender-adjusted fitness rating.

Convert daily steps into calories burned and distance covered — accounts for your weight & height.

Daily protein, carb, and fat targets in grams — tuned to whether you're cutting, maintaining, or bulking.

Pediatric BMI with rough CDC percentile category for children and teens aged 2–19.

Estimated due date from last menstrual period, conception date, or IVF transfer date.

AHA blood-pressure category — normal, elevated, stage 1, stage 2, or hypertensive crisis.

90-minute REM cycle bedtimes and wake times — wake at the end of a cycle, not in the middle of one.

Exact age in years, months, days, hours, and minutes — plus countdown to next birthday.