# Use The Body Mass Index Calculator To Find Your Ideal Weight

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You know you have to lose weight but do you know how much you have to lose? Do you have a target to shoot for? Like most things we are trying to achieve, losing weight works best when we have a goal. Otherwise, how will you know when you have lost enough weight? For goals to be effective, they have to be specific. You can use the Body Mass Index calculator to help you set the healthy weight target you need to meet.

How the Body Mass Index (BMI) works

To determine if we are underweight or overweight the BMI looks at our weight in relation to our height. This then falls within a certain range, which is regarded as healthy. Outside that range is regarded as under weight or overweight and not healthy. For example, a person who is six feet tall (182cm) is regarded as healthy if their weight falls between 145 and 182 pounds (67-83 kg). Someone 5 feet 8 inches (172cm) should weigh between 131 and 161 pounds (62-74 kg).

How to calculate your Body Mass Index

You can calculate your own BMI or you can use one of the many web sites with a calculator. If you want to do it yourself, the BMI formula is your weight divided by you height squared, then multiplied by 703, if you are working in pounds. This means for someone weighing 140 pounds who is 5 feet 10 inches (70 ins) tall, the calculation would be 140 divided by 4900 (70×70), which would equal 0.028. You multiply this by 703, which gives you a BMI of 19.68. To do the calculation in kilograms you simply divide your weight by your height squared and forget the 703. For example, someone who weighs 65 kilograms and is 1.78 meters tall would have a BMI of 20.51 (65/1.78×1.78).

If you are not much good at maths and you feel your eyes glazing over when you look at the figures, just go over them again and you will see they are not too hard to work out.