How TDEE is Calculated

Your Total Daily Energy Expenditure (TDEE) is an estimation of how many calories you burn per day when exercise is taken into account. It is calculated by first figuring out your Basal Metabolic Rate, then multiplying that value by an activity multiplier.

Since your BMR represents how many calories your body burns when at rest, it is then possible to adjust the number upwards to account for calories burned during physical activity.