Health & Fitness Calculators
BMI, daily calories, body measurements and practical wellness calculators.
Tools in this category
BMI
Calculate body mass index from height and weight.
Daily Calories (TDEE)
Estimate daily calorie needs (TDEE) from age, height, weight and activity, with targets for weight loss or gain.
Body Fat
Estimate body fat percentage from height, neck, waist and hip measurements using the US Navy method.
Macronutrients
Split calories into protein, carbohydrates and fat according to your goal.
Daily Water
Calculate the daily amount of water by weight and activity.
Running Pace
Calculate running pace, time or distance.
Calories Burned
How many calories an activity burns by time and weight.
Heart Rate
Find your target heart rate zones by age.
Due Date (Pregnancy)
Predict your due date and week of pregnancy.
Ovulation
Find your fertile days from your menstrual cycle.
Menstrual Cycle
Predict your upcoming menstrual cycles.
Sleep
Find good times to fall asleep or wake up, based on 90-minute sleep cycles.
Blood Alcohol (BAC)
Estimate blood alcohol percentage (indicative only — never drive under the influence).
1RM (One-Rep Max)
Calculate your maximum weight for one repetition (1RM).
Body Fat (Army Method)
Calculate body fat percentage with simple measurements (neck, waist, height) using the army formula.
Bra Size
Find the right bra size by measuring the bust and underbust.
Blood Type (Rh Compatibility)
Check blood type compatibility for transfusion and Rh in pregnancy.
Ideal Weight
Estimate your ideal body weight from height and sex using the Devine, Robinson, Miller and Hamwi formulas.
Pregnancy Weight Gain
Track recommended weight gain week by week during pregnancy.
Conception Date
Calculate the likely date of conception based on the due date or the date of the last period.
Carbohydrates
Calculate the recommended daily amount of carbohydrates for your goals.
Lean Body Mass
Calculate lean body mass using the Boer, James or Hume formulas.
Healthy Weight
Find your healthy weight range by BMI, height and age.
Daily Protein
Calculate the recommended daily amount of protein by weight, activity and goal.
Daily Fats
Calculate the recommended daily amount of fat by calories and goal.
GFR (Kidney Function)
Estimate the glomerular filtration rate (eGFR) using creatinine and demographic data.
Body Type
Determine your body type (ectomorph, mesomorph, endomorph) from body measurements.
Body Surface Area
Calculate body surface area using the Du Bois, Mosteller or Haycock formulas.
BMR (Basal Metabolic Rate)
Calculate how many calories the body burns at rest (BMR) with the Mifflin–St Jeor, Harris–Benedict and Katch–McArdle formulas.
Overweight (How Many kg to Lose)
See whether you are overweight and how many kilograms above a healthy weight (BMI 24.9) you are, with the estimated time to reach it.
Underweight (Low BMI)
Check whether BMI is below 18.5, the degree of underweight according to the WHO and how many kg are missing for the minimum healthy weight.
Food Points
Estimate the points of a food from calories, fat and fibre, using the classic formula of weight-loss programmes.
About this category
Health calculators explain common formulas such as BMI, daily calorie needs and age-related estimates. Results are educational and should not replace medical advice.
Frequently asked questions
Do these tools replace a visit to the doctor?
No. The calculators give indicative values based on standard formulas (Harris-Benedict, Mifflin-St Jeor, etc.). For a diagnosis or a personalised diet, consult your doctor or dietitian.
How is BMI calculated?
BMI = weight (kg) ÷ height (m) squared. Our tool also shows the category (underweight, normal, overweight, obese) and the ideal weight range for your height.
What is TDEE?
TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns per day, including basal metabolism and physical activity. It is used to plan a diet.