<prompt> Normal body mass index is-18.5 to 24.9915 to 1825.00 to 29.99Greater than 30  <response>: Commonly accepted BMI ranges are underweight: under 18.5 kgm2, normal weight: 18.5 to 25, overweight: 25 to 30, obese: over 30. Ref Davidson 23rd edition pg 699 