Available Calculators
Precise tools based on international medical standards
Body Mass Index
BMI • Healthy weight
Calculate your BMI using the standard formula. Determine if your weight is within the healthy range.
Calculate nowBasal Metabolic Rate
BMR • Metabolism • Energy
Discover how many calories your body needs at rest based on the Harris-Benedict equation.
Calculate nowTotal Daily Energy Expenditure
TDEE • Calories • Activity
Calculate your total daily calorie needs based on your basal metabolic rate and activity level.
Calculate nowHeart Rate Zones
5 Zones • Training Intensity
Calculate your 5 training zones using standard or Karvonen method for optimal exercise intensity.
Calculate nowDaily Water Intake
Hydration • Daily needs
Calculate your daily water requirements based on weight, activity and climate.
Calculate nowPack-Year Calculator
Smoking • Risk Assessment
Calculate cumulative tobacco exposure in pack-years for clinical assessment and screening eligibility.
Calculate nowBody Fat Percentage
Body Fat • Navy Method
Estimate your body fat percentage using the US Navy method with waist and neck measurements.
Calculate nowRelative Fat Mass
RFM • Height-Waist Ratio
Calculate body fat percentage using the relative fat mass index, based on height and waist.
Calculate nowWaist-to-Hip Ratio
WHR • Health Risk
Assess your health risk based on body fat distribution using waist and hip measurements.
Calculate nowWaist-to-Height Ratio
WHtR • Central adiposity
Calculate your waist-to-height ratio to assess cardiometabolic risk based on central adiposity indicators.
Calculate nowBody Adiposity Index
BAI • Hip-Based
Calculate body fat percentage without weight using the Body Adiposity Index based on hip and height.
Calculate nowBody Roundness Index
BRI • Body Shape
Quantify body shape and predict body fat percentage using the geometric Body Roundness Index.
Calculate nowBody Shape Index
ABSI • Mortality Risk
Calculate health risk using ABSI, which combines BMI and waist circumference to predict mortality risk.
Calculate nowBody Surface Area
BSA • Medical Dosing
Calculate BSA using multiple formulas for medication dosing and medical assessments.
Calculate nowNew BMI (Trefethen)
BMI 2.0 • Height Adjusted
Calculate the improved BMI formula that better accounts for tall and short individuals.
Calculate nowCooper Test VO2 Max
Cardiovascular • VO2 Max • 12-Min Test
Calculate your VO2 Max from the Cooper Test. Assess cardiovascular fitness based on distance covered in 12 minutes.
Calculate nowBlood Alcohol Content
Health Risk • Legal Limits • BAC
Calculate your Blood Alcohol Content using the Widmark formula. Assess alcohol levels and time to sobriety based on drinks consumed.
Calculate nowDietary Reference Intake
DRI • Nutrition
Get personalized daily nutrient recommendations for vitamins, minerals, and macronutrients based on age and sex.
Calculate nowLean Body Mass
LBM • Body Composition
Calculate lean body mass using Boer or Hume formulas. Estimate muscle mass and body fat percentage.
Calculate nowEstimated Date of Delivery
EDD • Obstetrics
Calculate pregnancy due date using LMP, IVF transfer, or ultrasound. Get gestational age and trimester information.
Calculate nowOne-Repetition Maximum
1RM • Strength Training
Calculate your one-rep max using 11 validated formulas. Essential for strength programming and tracking progress.
Calculate nowWhy Choose Calc4Health?
The most reliable and complete health calculator platform
Scientific Precision
Formulas validated by international medical organizations such as WHO, AHA, and ESC.
Total Privacy
All calculations are performed locally. Your data is neither stored nor shared.
Easy to Use
Intuitive interface designed for healthcare professionals and patients alike.