Harris-Benedict Equation — Resting Energy Expenditure

The Harris-Benedict Equation (revised by Mifflin-St Jeor variants also exist) is the original validated formula for estimating Resting Energy Expenditure (REE), also called Basal Metabolic Rate (BMR). The revised Harris-Benedict equations (Roza and Shizgal, 1984 revision) are: Men: REE = 88.362 + (13.397 × weight kg) + (4.799 × height cm) − (5.677 × age years); Women: REE = 447.593 + (9.247 × weight kg) + (3.098 × height cm) − (4.330 × age years). Total Daily Energy Expenditure (TDEE) = REE × activity factor. Harris-Benedict is widely used in clinical nutrition planning to estimate daily caloric requirements.