I’ve already explained how to calculate the bmi of a normal human being in a previous post.
But if you refer not to do any mathematical calculations, then you can feed in the values explained in that post into this web app, and it will instantly tell you your BMI.
All you need to do is feed in your weight and height i the required units. For best results, make sure you enter the weight in (Kg) and the height in (M).
You can also calculate your BMI using the Android app as explained in this video.