I've heard that over 1850 is a competitive score on the new SATs.
There isn't a conversion between the two. The SAT I is the standard math, reading, writing test, which is required for most colleges. The SAT II, know as SAT Subject Tests, are one hour tests in one subject only. These tests allow you to show your strengths in particular subjects - especially the sciences and foreign languages as these are not tested on the SAT I - but most students take them because some colleges require them. SAT II scores have varying curves depending on the test, so conversion to SAT I scores is impossible.
ACT: SAT
No colleges accept AP scores instead of SAT scores. This is because the tests do not measure the same things.The SAT measures the likelihood that a student will do well in college, but is not accepted as college credit. The AP is used to provide actual college credit, but does not predict college success.
All colleges have different timelines for when SAT scores are due. Go to a particular school's website and under admission, you can find out their specific timeline.
Score choice allows you to pick your top scores from each section of all the SAT tests you took combined. Some colleges do not allow score choice, so make sure you do your research before sending scores.
Bowdoin, Bates, Hampshire
You can request SAT Scores to be sent to colleges using the CollegeBoard website. Your SAT Scores will also be stored by CollegeBoard on their website and can be accessed on demand.
Most colleges will accept both, but you will find that, typically, colleges on either US coast will prefer the SAT and colleges are more inland will prefer the ACT.
There is no 'pass/fail' aspect of the SAT Subject Tests. You must decide what is acceptable for your personal ability. Minimum scores depend largely on the colleges to which you are applying.
The SAT Subject Tests are nationally administered tests that inform colleges of your understanding of specific subject areas. These tests assess your knowledge in particular subjects such as Math, Science, History, and Foreign Languages. Colleges use these scores to evaluate your proficiency in these areas.
1700 on the new sat grading system
A few universities like SRM , Amity , NIIT etc. consider your SAT scores. But by no means do they accept SAT scores as an admission criterion. But SAT scores are a very vital part of foreign university applications.