I'm considering joining the military but am concerned. How hard is the asvab?

The ASVAB is easy. But you are going to need your diploma or a GED to enlist

I did a Google search for ASVAB Practice Test. Lots of listings for practice test and sample test questions. Looks like there's lots of on-line free help in preparing for the test. http://www.todaysmilitary.com looked good. The Air Force and Navy also have on line resources.

As far as ASVAB score goes, the higher the better. I couldn't find a minimum score to enlist for the Army. I did find this on the USAF web page, "To join the Air Force as an enlisted Airman, you must achieve a minimum overall qualifying ASVAB score of 31 if you are a high school senior or have a high school diploma, and 50 if you are a GED holder." The Air Force, and I expect the other Services, have minimum ASVAB scores for some specialties. More technical specialties, such as Information Technology or aircraft maintenance, will require higher ASVAB scores. Recruits with lower or near-minimum scores may be sent to less skilled or less desirable specialties.

Jon Carper, what you didn't mention was whether you have a GED or not. It will be more difficult for you to enlist in any service without a high school diploma or GED. Many public school systems and some Community Colleges provide free or low-cost GED preparation classes. I strongly advise you to get a least a GED before you try to enlist. It might increase your chances of being accepted for enlistment.

There are plenty of study guides available for purchase. Good luck.