If you want to calculate your BMI yourself the formula is: W/L² where L=length in m and W=weight in kg, weight/length*length. If you want to change the formula to lbs and inch it would be: (W/2,2)/(((length*2,54)/100)*((length*2,54)/100))
If you don't want to do the calculating yourself, you can use this BMI test instead :)
A calculator might come in handy if you decide to give it a try yourself :)
My weight is 130,6kg (at oct. 15 -01) and I'm 1,67m tall (short ;o).
We take the weight (130,6) divide it with the length (1,67) to the power of 2 (1,67*1,67), that would be 130,6/1,67² or 130,6/1,67*1,67. That makes my BMI: 47,26 rounded = 47, as you can see I'm not exactly slim ;o).
Some guidelines to what BMI one should have: