In a balanced diet, a man needs approximately 2,500 kcal in a day to maintain his weight, whereas a woman needs around 2,000 kcal a day. One pound is equal to 3,500 calories. So, logically a '500 calorie daily deficit' should lead to '1 pound fat loss' per week. But, it is observed that in reality this may not work efficiently. Although an absolute minimum calorie intake to lose weight cannot be set as it varies according to the body composition and activity level. However, it is possible to find out the daily calorie intake for you, if you want to lose weight, using following guidelines. Calculate Daily Calorie Intake to Lose Weight The daily calorie intake will vary according to age, gender, health, height, weight, environment, genetics, diet, exercise routine, body-fat percentage, etc. Roughly, it is accepted that women who are not active need about 1,200-1,300 calories per day, while active women need about 1,400-1,600 calories per day to carry out the basic activities and bodily functions of the day. A woman's minimum calorie intake should not be below 1,200 calories in a day. The simple formula called Harris-Benedict Principle helps find the basal metabolic rate (BMR). It tells us about the amount of energy required by the body for the daily functions. For effective weight loss, women need to lower their daily calorie intake. To determine the minimum calorie intake, you need to calculate your BMR first. BMR of an adult women = 655 + (9.6 * weight in kg) + (1.8 * height in cm) - (4.7 * age in years) or BMR of an adult women = 655 + (4.35 * weight in pounds) + ( 4.7 * height in inches) - (4.7 * age in years)

Type of Physical Activity	Daily Calories Needed
Very little or no exercise	BMR * 1.2
Light exercise: 1-3 days per week	BMR * 1.375
Moderate exercise: 3-5 days per week	BMR * 1.55
Heavy exercise: almost everyday	BMR * 1.725
Very heavy exercise: twice a day or extremely heavy workout	BMR * 1.9

With the help of the formula, you can calculate the number of calories that you require daily to maintain your current weight. Once you know your BMR, you can calculate the required daily calorie intake for you and then reduce it gradually to lose weight. Remember, you should burn certain amount of calories by performing exercises. If the amount of calories burnt is more than the amount of calories taken in, weight loss is possible. Calorie Content of Common Foods If you wish to calculate the calories intake, here is a food calories list for you.

Name of the Food Item	Number of Calories (per 100 g or 100 ml)	Name of the Food Item	Number of Calories (per 100 g or 100 ml)
Turkey	179	Lamb	260
Pork	142	Mutton	181
Herring	167	Carp	104
Salami	519	Chicken	142
Apples	67	Pears	79
Oranges	47	Grapes	93
Potatoes	88	Mushrooms	35
Carrots	45	Green peas	96
Biscuits	425	Wheat flour	349
Pasta with eggs	386	Brown wheat bread	242

The knowledge of the minimum calorie intake for weight loss would help you shed the extra pounds, provided your diet is accompanied by proper exercise. Calories should be cut down gradually. It is risky to reduce the calorie intake drastically. A sudden drop may affect the body's metabolism adversely. Also, you should recalculate the required daily calorie intake when you lose some weight, to assess your altered BMR.