No. 100 calories/mile is the general estimate given for running for an average weight. More for overweight/obese people. Running on a treadmill for an hour wou

No. 100 calories/mile is the general estimate given for running for an average weight. More for overweight/obese people. Running on a treadmill for an hour would be anything from 6 miles (10km) to 12 miles (20km) for some of the very best runners, so 600 calories to 1200 calories.