how to caculate body fat percentage?

i want some guideline to calculate body fat percentage. i am 180 cm my weight is 80 kg & my belly is 36" my hip is 38" what is my fat percentage?

Public Comments

1. http://lowcarbdiets.about.com/library/blbodyfatcalculator.htm here is a body fat percentage calculator
2. you need to measure your neck, and thighs as well. Body mass index (BMI) is measure of body fat based on height and weight that applies to both adult men and women. Enter your weight and height using Standard or Metric measures here: http://www.nhlbisupport.com/bmi/bmi-m.htm