The definition of injustice is something that is not fair or just. An example of injustice is when an innocent person is sent to jail for a crime he did not commit. the quality of being unjust or unfair; lack of justice. an unjust act; injury.
That means that you don't exercise on a regular basis. The calorie calculator may say that you need to eat 1,200 calories per day to lose weight. But you don't think that you can cut enough food from your diet to reach that number. That's okay.
In order to lose weight you need to eat less calories per day than your body needs. To lose 1lb a week you need a negative calorie balance of 500 calories per day. To lose weight at 2lb a week you need to reduce your calorie intake by 1000 calories a day. Weight Loss Resources has all the tools you need to calorie count for weight loss. Including online calorie and nutrition databases, with information for UK and USA foods.