Whether using the the standard or new BMI results, you should aim for a BMI of between 18.5 and 25.
Standard BMI vs New BMI
The most common method used by medical practitioners to decide whether you are overweight is the standard Body Mass Index. This decides whether your weight is healthy for your height.
The standard Body Mass Index has some disadvantages, in particular it's not very accurate for people who are very short or very tall. The new Body Mass Index calculation aims to solve this problem.