Cooking chicken on the grill takes from 18 to 25 minutes.
Too cook chicken on the grill let one side cook until you see grill marks on the chicken and then flip the chicken over and cook again until grill marks show.
Keep flipping the chicken over and over every 3 to 5 minutes for 20 to 25 minutes or until you see no more red spots or blood coming from the chicken.
Another great way of ensuring that your chicken is fully cooked is to use a meat thermometer and if the internal temperature of the chicken is between 160 F and 165 F then it should be fully cooked.
Stick the meat thermometer into the thickest part of the chicken to get an accurate reading.