Your basal metabolic rate (BMR) is the energy your body expends to maintain normal bodily functions such as heart beat, respiration, digestion, and maintenance of body temperature. Your BMR is influenced by a number of factors including age, body size, gender, diet, and environmental temperature.

Estimate your BMR (calories/day) with the calculator below. Enter your age, weight, and height, then click the submit button.

Physical Characteristics	Basel Metabolic Rate (BMR)
Age in years: Weight in pounds: Height in inches:	Calories/day for men Calories/day for women

Of course, your body burns additional calories during all your non "at rest" hours of the day with a burn rate proportional to the intensity of the activity. For example, walking around at home or work requires only a small number of additional calories, whereas running or hard climbing can burn hundreds of additional calories per hour.

Fill in the fields below to determine your approximate daily caloric requirement. Estimate the time you spend (in minutes) in each physical activity category. Strive for precise estimates--for example, a two-hour climbing gym workout might be entered as 30 minutes of "heavy" activity (actual climbing) and 90 minutes of "very light" activity (belaying and walking around).

Physical Activity, minutes/day					Total Energy Requirement
Very Light	Light	Moderate	Heavy	Very Heavy
Examples: walking, belaying, etc.	Examples: fast walking, easy bicycling, light hiking	Examples: jogging, hiking, bicycling easy climbing	Examples: running, difficult climbing, lifting weights, steep hiking	Examples: sprinting, climbing at personal limit, mountaineering with heavy pack	calories/day for men calories/day for women

Note: This BMR Calculator was developed by the University of Minnesota, and has been adapted for climbers by TrainingForClimbing.com.