To lose weight, you need to consume fewer calories than your body burns, putting your body in an energy deficit state. The liver and muscles have a limited storage capacity for glycogen, so once the glycogen stores are full, the excess glucose is converted to triglycerides and stored in fat cells. When your body gets more glucose than it needs for energy, the surplus gets sent to the liver and muscles and stored as glycogen for later use. Glucose (blood sugar) is the body's principal energy source from food. Your body requires energy to power its essential functions to maintain life and perform physical work. Consult a doctor for guidance and support if you consider consuming a diet of fewer than 1,000 kcal or 4,200 kJ per day. You can change your target date later to increase or decrease your required calorie intake. Nutrition therapists will tell you that, below those levels, you will not meet food group targets and nutrient recommendations. Otherwise, it will automatically modify your target date for a minimum daily intake of 1,200 calories for women and 1,500 for men. The calculator will only produce results if it determines the required food energy intake to reach your goal weight by the target date is more than 1,000 calories per day. Enter a time frame for your goal weight (start date and target date). If you are unsure of your physical activity level, start with the default - the worst-case scenario. Physical activity levels can range from 1.4 (little activity) to 2.3 (very active).
![macro calculator for weight loss macro calculator for weight loss](https://www.bodybuilding.com/images/2016/july/ask-the-ripped-dude-magical-macronutrient-ratio-for-fat-loss-tall-v2.jpg)
Click the Physical Activity field to find your physical activity level.
![macro calculator for weight loss macro calculator for weight loss](https://www.shape-able.com/wp-content/uploads/carb-calculator-fb.jpg)
![macro calculator for weight loss macro calculator for weight loss](https://www.sandandsteelfitness.com/wp-content/uploads/2018/03/Macro-Calculator.jpg)
Enter your age, sex, height, current weight, and goal weight.