I agree with Brian - I always err on the side of caution and allow 2 hours/lb. While I typically don't need 2 hours, it's better to finish early and allow more rest time than to be pacing the floor 15 minutes before dinner wondering why I have not reached the desired IT! Also, be sure to allow at least an hour extra for the rest period...foil wrapped and in a cooler with towels. Good luck!