How to work bmi out manually

 · When using English measurements, ounces (oz) and fractions must be changed to decimal values. Then, calculate BMI by dividing weight in pounds (lb) by height in inches (in) squared and multiplying by a conversion factor of When using a handheld calculator, if your calculator has a square function, divide weight (lb) by height (in) squared, multiply by , and .  · Formula: weight (kg) / [height (m)]2. Calculation: [weight (kg) / height (cm) / height (cm)] x 10, With the metric system, the formula for BMI is weight in kilograms divided by height in meters squared. Since height is commonly measured in centimeters, an alternate calculation formula, dividing the weight in kilograms by the height in centimeters squared, and .  · How is BMI calculated manually? Then, calculate BMI by dividing weight in pounds (lb) by height in inches (in) squared and multiplying by a conversion factor of When using a handheld calculator, if your calculator has a square function, divide weight (lb) by height (in) squared, multiply by , and round to one decimal place.

2. Locate the child's percentile. To use the BMI growth chart, first find the child's age along the bottom of the chart, then find the child's BMI along the side. Use a piece of paper or other straight edge to find the point on the chart that corresponds with the child's BMI and age. BMI is a measurement which determines which weight category a person belongs to. Depending on their height and weight, a person can belong to one of the following weight categories: underweight (BMI less than ) normal weight (BMI between ) overweight (BMI between ). Once you have figured out your child's index, you can refer to the BMI printable chart to find out what percentile your child is in: Print It! Body Mass Index-for-Age Percentiles: Boys, 2 to 20 years.

The equation is weight/height 2. Multiply that answer by To get your BMI, you will then need to multiply your last answer by For example, multiplied by equals , so your approximate BMI in this example would be How to calculate BMI? If you wish to calculate BMI yourself, below are the BMI formulas for both English units and metric units: Metric Units: BMI = Weight (kg) / (Height (m) x Height (m)) English Units: BMI = Weight (lb) / (Height (in) x Height (in)) x Examples 1: Someone who is m and weights 60 kg has a BMI of. BMI is a measurement which determines which weight category a person belongs to. Depending on their height and weight, a person can belong to one of the following weight categories: underweight (BMI less than ) normal weight (BMI between ) overweight (BMI between ).