This Calorie Calculator is based on the Mifflin-St Jeor Equation which calculates basal metabolic rate (BMR), and its results are based on an estimated average. The basal metabolic rate is the amount of energy expended per day at rest. There exist other equations including the Harris-Benedict Equation which was used until 1990 before the introduction of the Mifflin-St Jeor Equation and the Katch-McArdle Formula which calculates resting daily energy expenditure (RDEE) by taking lean body mass into account. The Mifflin-St Jeor Equation is considered the most accurate equation for calculating BMR, with the exception that the Katch-McArdle Formula can be more accurate for people who are leaner that know their body fat percentage. The Mifflin-St Jeor Equation is as follows:

Consult your physician and follow all safety instructions before beginning any exercise program or using any supplement or meal replacement product, especially if you have any unique medical conditions or needs. The contents on our website are for informational purposes only, and are not intended to diagnose any medical condition, replace the advice of a healthcare professional, or provide any medical advice, diagnosis, or treatment.
The good news is that there’s increasing evidence that the brain can, in large part, “fix” itself once new behavior patterns emerge (i.e., calorie restriction, healthy food choices, and exercise). While there may be some degree of “damage” to the brain, particularly in how hunger and satiety hormones function, it can correct itself to a large degree over time. The key is that the process does take time, and like any other behavior change, is ultimately a practice. “We want to change behavior here,” says Hill. “Anyone that tells you it’s going to happen in 12 weeks, that’s bogus. We’re trying to rewire the brain. Neurobiology has told us so much about what’s going on in weight gain and weight loss. It takes a long time to develop new habits, rituals, routines. This takes months and years. But it will happen.”
There is a substantial market for products which claim to make weight loss easier, quicker, cheaper, more reliable, or less painful. These include books, DVDs, CDs, cremes, lotions, pills, rings and earrings, body wraps, body belts and other materials, fitness centers, clinics, personal coaches, weight loss groups, and food products and supplements.[23]
Ultimately, weight loss for the long-term requires some short-term behavior change and healthier habit formation. That's why we created our Good Housekeeping Nutritionist Approved Emblem, which exists to help turn smart food choices into healthier eating habits. All GHNA foods and drinks make it easier to find — and eat — good-for-you foods without additional time, effort, and cost. We target the lifestyle-related factors that make healthier eating hard, and find simple but creative solutions that actually work! Look for the emblem on labels wherever you shop for food!
One study showed that older women who lost at least 5% of their body weight lowered their chances of breast cancer by 12%. There’s no such clear proof that losing weight protects you from other types, but some changes that happen when you shed pounds hint that it might. For example, overweight people who slim down have lower levels of some hormones linked to cancer, like estrogens, insulin, and androgens.
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