Free Health & Lifestyle Calculators
BMI, calories, ideal weight, due date, ovulation and more. Fast, accurate, and free — no install, no sign-up.
MoneyComon Health gathers the health and lifestyle calculations people search for most — BMI, calories/TDEE, ideal weight, body fat, ovulation and due date — in one free, easy-to-use place.
Every calculation runs instantly in your browser. Your inputs are never sent to or stored on a server. Units are metric by default with imperial noted where helpful.
Health Calculators
BMI Calculator
Find your body mass index (BMI) and weight category from your height and weight, with WHO and Asian-Pacific cut-offs.
Calorie Calculator (BMR & TDEE)
Estimate your basal metabolic rate and daily calorie needs using the Mifflin-St Jeor formula and activity factors.
Ideal Weight Calculator
Get your ideal body weight (BMI 22) and the healthy weight range for your height.
Body Fat Percentage Calculator
Estimate body fat percentage and fat mass with just a tape measure using the U.S. Navy method.
Protein Intake Calculator
Calculate your daily protein target (0.8–2.0 g/kg) for your goal and split it across meals.
Daily Water Intake Calculator
Estimate how much water to drink per day from body weight plus an exercise adjustment, in cups and liters.
Ovulation Calculator
Find your estimated ovulation day, fertile window and next period from your last period and cycle length.
Due Date Calculator
Estimate your pregnancy due date (LMP + 280 days) plus current gestational age and trimester.
Alcohol Metabolism Calculator
Estimate blood alcohol concentration (BAC) and sober-up time with the Widmark formula (reference only).
Lifestyle Calculators
Day Counter & Date Calculator
Count down to a date (D-day), measure days between two dates, or add/subtract days from a date.
Sleep Calculator
Find the best bedtime or wake-up time using 90-minute sleep cycles for a more refreshed morning.
Pyeong ↔ m² Area Converter
Convert between pyeong and square meters (1 pyeong = 3.305785 m²) in both directions.
Health Guides
Why use MoneyComon Health
- Free and instant: calculate right in your browser — no install, no account.
- Privacy first: all calculations run on your device; your inputs are never sent to a server.
- Trusted formulas: BMI categories follow WHO/Asian-Pacific cut-offs and calories use the Mifflin-St Jeor formula.
- Mobile optimized: fast, readable pages that work great on a phone.
Learn more about how this site is run and sourced on the About page.
Last updated: 2026-06-25