How many calories should I be consuming?!

layliffe
layliffe Posts: 6
I am 16 yrs old, 5'3, and weigh around 118-121 ... I try to exercise for an hour 5 days a week, but other than that I am mostly sitting down. How many calories should I be eating to maintain my weight? Websites vary from 1300 to 3000, too confused, please help (:
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