A pound of fat is 3,500 Calories!! So...
Don't expect multi pound weight loss every day. There are many threads here explaining wooshes, plateaus, and why multi pound losses happens in a day or a week. Its great when/if it happens but many get very discouraged when it doesn't happen all the time.
However, don't expect them to occur regularly.
If you ate nothing and your body reacted like a computer, you should expect a 1/3 to 1/2 pound (depending on your BMR) loss a day. This does not take into account exercise.
Of course our bodies are not computers, and some retain water more than others, stress and other factors will lead to less of a fat burn, and yes you have to eat at some point! My weight loss chart looks like a descending cardio gram (up down up down). I don't get frustrated anymore as long as I know I am working my plan. The results come at their own pace.
That's my thought for today!