Will i be alright with eating 1800 calories a day?

You should look into your BMI which will tell you the amount of calories your body burns without activity.

To give you a ballpark estimate, 5,000 calories is the equivalent of 1lb. But it also depends on if your eating healthy calories or lethargic calories such as excessive carbohydrates (bread n such) or really fatty food, at 5'6" and 120lbs your near an ideal weight you could even gain a few so don't worry too much, your still growing and if your active, 1800 calories may be too little!

Live your life! Don't worry too much about calories at your age!

I'm 17, 5'10" 154 (mostly muscle lol) and i eat 1300 caloaries a day a do 1-2 hours exercise every and I am maintiaing /losing weight, so i guess 1800 would help to maintain.

...If being 120 at 5'6" is your thing, then sure... But since you're a guy you could probably get away with eating 2500 with all your exercise and still not gain weight. You might actually lose weight eating only 1800.

:( I'm jealous because you weigh less than me. And I'm a girl.

I am 13 too, but I am 5'9

I think thats a lot. I eat about 1200 and i weight 140.

yeah you should eat around 1600-1800 calories a day.

You could eat less, but best to lose weight slowly. A pound is 3500 calories.. Goodluck!

Yes, as young as you are and as active as you are, you need that many calories.