How is this possible?

When I entered the goal weight & date in the settings menu, it said that the daily calorie intake must be 1200 calories or more. And when I add all the food I've eaten all day long and sum up the calories, it turns out that I take only 500 calories (more or less) per day. Does it mean that I take less than half of the recommended calories while still eating normally and feeling good?

Are you measuring (weighing is best) all of your food, and including all the extras (cooking oil, condiments, etc)?

If you are only eating 500 calories I am surprised you are feeling good and doubt you are eating 'normally'. Why don't you post a sample menu of what you eat in a day to see what you are surviving on because I can't understand how your body functions on so few calories.

It's possible to feel like you're eating normally but undereat if the foods you're choosing happen to be very low in calories.  Some people making the mistake of thinking that if they eat nothing but lots of lettuce and carrots that's a healthy diet, for example... when of course it wouldn't be.

Rather than logging your day after it happens and when it's too late to make any changes,  I'd suggest you use the CC food log to map out tomorrow's food in advance.  If you need 1200 cals then you're looking at 3 x 400 cal meals.

A 400 cal breakfast, for example, could be 2 poached eggs (140) on 2 slices of wholegrain toast (160) and a small glass of orange juice (100).... 

If you work it out ahead of schedule you'll get a more realistic idea of what a 1200 cal daily diet might look like.

Everyone here has given good advice.

I thought I was logging everything in my own daily pages, but discovered (just the other day, actually) that I had completely forgotten about the non-dairy creamer in my coffee!!! There goes an additional 90-120 cals. per day that I had absolutely given no thought to!!

So, I changed to a smaller measurement (trying to cut back anyway) , a lower cal-containing brand, and then started to log it all every day since...making it much more accurate for myself.

Even when we try as hard as we can to get it all in, there is bound to be something we might miss, or if we think we are healthy @ 500 per day, we are only fooling ourselves.

Just remember you need AT LEAST 1200 just to maintain @ a healthy functioning level ~ and if you are trying to lose, you need at least 200-400 more than that!