There are several easy-to-use online caloric needs calculators, like the one at CalorieCount.com. These tools provide a quick and easy estimate of the number of calories you need to eat to lose weight. To get the most accurate number, you need to know your current weight, height and goal weight. You also need to assess your daily activity level.
The number generated from these calculators is usually based on the Harris-Benedict formula for determining basal metabolic rate (BMR). The formula is widely recognized by experts as a reasonable estimate for daily caloric need. However, it is only as accurate as the information you provide and the answer is based on general guidelines. Daily activity level, for example, varies widely from person to person and there is no way for a single formula to accurately predict the metabolic impact of your specific activity level.
Pros: Provides a fast answer, free to useCons: Only based on general guidelines and estimates
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