health Calculator


Calculator FAQ

What is a BMI Calculator?

  • A BMI calculator is an online or offline device that measures your body mass index. 
  • The body mass index or BMI is a measure of how much body mass you have in relation to your height and weight.
  • Body mass refers not only to the fat within your body but also to muscles and bones. 
  • It is calculated by taking your weight and dividing it by the square of your height. 
  • The BMI figures let you know whether you are within the normal weight range, or if you are underweight or overweight.
  • Both high BMIs and low ones are known to raise a host of health problems, especially as you age. 
  • However, a high BMI in itself is not always, medically speaking, a cause for alarm. It should be viewed in conjunction with other health parameters.

How to calculate BMI?

  • To find out if your BMI is or someone else’s BMI, the calculation process is simple. 
  • You can do this yourself by using a handheld BMI Calculator or do this online via websites or apps containing body mass index calculators or BMI Calculator.
  • To arrive at the result yourself, you simply divide your weight in kilograms by the square of your height in meters. 
  • Or simply input your height and weight in an app or website and the BMI results will flash on your screen.

If the numbers show that your BMI is above normal or below the normal range, you should get yourself checked by a doctor at least once every six months or at least once a year.


  • A number between 18.5 to 25 kg/m2 is considered a normal BMI
  • Less than 15 is classified as very severely underweight
  • From 15 to 18 is categorized as underweight
  • From 25 to 30 is considered overweight. 
  • From 30 to 40 is classified as obese
  • Above 40 as very severely obese.

IS BMI Reliable?

  • Your BMI helps measure how appropriate your weight is for your height. 
  • While some people might be naturally broader, the BMI range allows for these discrepancies. 
  • The BMI measure works to help you understand whether you fall under the normal weight, overweight or obese category. 
  • People who carry extra weight, especially around their stomach, are prone to developing lifestyle diseases such as diabetes, cancer or heart issues. 
  • For adults, the BMI offers a good estimate of weight-related health problems.
  • Most often, physicians accurately measure your height and weight and use your BMI to understand your future health risks. 
  • If your BMI is higher than it should be, they will likely recommend some kind of diet and exercise regime to bring your weight down.
  • A body mass index in the low range signals that you could be malnourished. 
  • Maybe your body isn’t properly absorbing nutrients or maybe you’re just not getting enough calories to support your activity level.

How Do I calculate my BMI

  • BMI or body mass index is a measure of how much body mass an individual has according to his weight and height. 
  • To calculate your BMI, simply divide your weight in kilograms by your height squared in meters or use BMI Calculator. 
  • You can also find the results instantly by entering the height and weight data in online BMI calculators. 
  • BMI is not always an appropriate indicator of a person’s health. 
  • Growing children and elderly people may have less muscle mass and therefore lower weight, thus lowering their BMI in Calculator. 
  • On the other hand, athletes may have higher BMI as they put on plenty of muscle from exercise.

How do you calculate total body water?

Formula For Calculating Total Body water for male and female are :

  • Male TBW = 2.447 - (0.09156 x age) + (0.1074 x height) + (0.3362 x weight)
  • Female TBW = -2.097 + (0.1069 x height) + (0.2466 x weight)

How many liters is total body water?

Here are agewise total body water intake is given.


Recommended total body water (milliliters per day)

0–6 months


6–12 months


1–2 years


4–8 years


9–13 years (males)


9–13 years (females)


14–18 years (males)


14–18 years (females)


Adult male


Adult female


During pregnancy


While breastfeeding


How much water is too much?

Many people wonder if there is actually a point where you can drink too much water. There are some rare cases of someone over-hydrating, known as hyponatremia. However, it is very rare and usually only seen in endurance athletes who are over-drinking while doing very intense exercise or in older adults with certain health conditions.

What is normal gestational age?

  • The pregnancy is considered full-term at 37 weeks.
  • However, the fetus's lungs are usually fully developed at 34 weeks, allowing for a high chance of survival outside of the womb beyond that point.
  • Concluding, a baby born after 34 weeks of pregnancy may enjoy the same health as their peers born on term which is consoidered as normal gestational age.

How to calculate gestational age?

You can calculate the gestational age of a baby:

  • Using the last menstrual period date;
  • Assessing it with the ultrasound machine and fetal measurements; or
  • Applying the fertilization date, if we know it

How do we measure the time in gestational age?

  • Gestational age time is usually measured in weeks.
  • The entire pregnancy lasts around 40 weeks or 280 days.
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