Is a 13 year old in seventh grade?

Answer 1

A 13 year old would normally be in either 7th or 8th grade. You normally start 7th grade at 12 and turn 13 during the school year or the summer after (depending on when your birthday is), so then the normal age for 8th grade is 13-14.

Answer 2

7th or 8th grade unless there are different circumstances (they could still be in 6th grade when they turn 13 if they were held back a year, or could still be 13 when they start 9th grade if they are a year ahead in school or if they have a really late birthday before the cut-off date).