I made a 1630 on the SAT in seventh grade. My scores were:
Math: 500
Reading: 570
Writing:560
(And for anyone wondering, this was the real SAT, not the PSAT or anything like that. I took it through Duke Tip)
Does anyone know how I can calculate my expected score for when I take the SAT in junior or senior year?
You can take a practice test under the same conditions as the real test and see how you score on that.
Why don’t you just take a practice test?
https://sat.collegeboard.org/practice/sat-practice-test
Any calculations based on your 7th grade score is likely to be inaccurate.
You really can’t predict it too much because your knowledge has changed a lot since then. I would just try some practice tests now and see how you do
Um, I would but its only been a year. I’m not preparing to take it or anything, I’m just curious 
Well your math score should go up by a lot by the time you are in 9th/10th grade just because you probably haven’t been taught a good amount of the material that the SAT tests. You’re reading and writing should also improve but not as dramatically. I think you will probably do pretty good, 2000+ when you take it later in high school.