A little more information. My BMR is 1715. I then multiply that by 1.2 (little to no exercise) as per instructions and come up with 2058. It takes me about 1:45 to go 30 miles. I am only going by what the HRM tells me. Have only been riding four months and is still new to all this. Seems the HRM estimates are to high. Will go on the assumption of 500 cal. per hour.