There isn't a direct conversion between SAT and Accuplacer, at the moment (although there may be one after the College Board completes their revision), but there are some correlation documents out there, mainly used by community colleges and some four-year colleges to determine placement into remedial coursework vs college-level courses. These may give you some support in using SATs as a substitute for Accuplacer.

The short version is that the SATs have a higher ceiling than Accuplacer does, with the latter maxing out around SAT 560 Verbal and 630 Math equivalent.

Correlation document comparing Accuplacer, SAT, ACT:

https://wvde.state.wv.us/abe/documents/CorrelationBetweenVariousPlacementInstruments.pdf

Sample placement cutoff scores from community colleges somewhere in the USA:
https://www.bc3.edu/admission/pdf/interpret-your-placement-test-results.pdf
https://www.yc.edu/v5content/testing-center/docs/ScorePlacementChart.pdf

...pronounced like the long vowel and first letter of the alphabet...