Khan Academy Practice Test?

How accurate are Khan Academy practice tests compared to actual test scores? I took a practice test and scored an 1190 (570 math 620 english). I want to get a 1300 on my on an actual SAT test. How much practice will I need to put in?

The tests are very accurate to real SATs as they are made by the college board and some have even been administered. Don’t be discouraged about if you get a low score at first, just practice and be patient. On my first practice test this year I scored 120 points lower than my second. Just get used to the weird style of questions, as you’re smart enough to achieve your goal for sure.